I'm not sure if they are privileged or not...
From within Linux deploy I was mounting / to /android and /sdcard to /sdcard.
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adrianp@bellatrix-n2:~$ mount
/dev/block/loop0 on / type ext4 (rw,relatime,seclabel,data=ordered)
proc on /proc type proc (rw,relatime,gid=3009,hidepid=2)
sys on /sys type sysfs (rw,relatime,seclabel)
tmpfs on /dev type tmpfs (rw,nosuid,relatime,seclabel,mode=755)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,relatime,seclabel)
devpts on /dev/pts type devpts (rw,relatime,seclabel,mode=600,ptmxmode=000)
/data/media on /sdcard type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=7,derive_gid,default_normal)
/dev/block/system on /android type ext4 (ro,nodev,relatime,seclabel,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/etc/auto.sshfs on /media/sshfs type autofs (rw,relatime,fd=7,pgrp=7406,timeout=20,minproto=5,maxproto=5,indirect)
cgroup on /sys/fs/cgroup type tmpfs (rw,relatime,seclabel,mode=755)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,relatime,cpuset,noprefix,release_agent=/sbin/cpuset_release_agent)
cgroup on /sys/fs/cgroup/cpu type cgroup (rw,relatime,cpu)
cgroup on /sys/fs/cgroup/cpuacct type cgroup (rw,relatime,cpuacct)
cgroup on /sys/fs/cgroup/schedtune type cgroup (rw,relatime,schedtune)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,relatime,memory)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,relatime,devices)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,relatime,freezer)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,relatime,pids)
cgroup on /sys/fs/cgroup/debug type cgroup (rw,relatime,debug)
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root@odroidn2:/ # mount | grep -v .magisk | grep -v fuse.rclone
tmpfs on /dev type tmpfs (rw,seclabel,nosuid,relatime,mode=755)
devpts on /dev/pts type devpts (rw,seclabel,relatime,mode=600,ptmxmode=000)
proc on /proc type proc (rw,relatime,gid=3009,hidepid=2)
sysfs on /sys type sysfs (rw,seclabel,relatime)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
tmpfs on /mnt type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,mode=755,gid=1000)
tmpfs on /apex type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,mode=755)
/dev/block/vendor on /vendor type ext4 (ro,seclabel,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/dev/block/system on / type ext4 (ro,seclabel,nodev,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/dev/block/odm on /odm type vfat (rw,relatime,fmask=0000,dmask=0000,allow_utime=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
tmpfs on /sbin type tmpfs (rw,seclabel,relatime,mode=755)
none on /dev/cg2_bpf type cgroup2 (rw,nosuid,nodev,noexec,relatime)
none on /dev/cpuctl type cgroup (rw,nosuid,nodev,noexec,relatime,cpu)
none on /acct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct)
none on /dev/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset,noprefix,release_agent=/sbin/cpuset_release_agent)
none on /dev/memcg type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
none on /dev/stune type cgroup (rw,nosuid,nodev,noexec,relatime,schedtune)
/dev/block/system on /apex/com.android.tzdata@290000000 type ext4 (ro,seclabel,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/dev/block/system on /apex/com.android.tzdata type ext4 (ro,seclabel,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/dev/block/system on /apex/com.android.runtime@1 type ext4 (ro,seclabel,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/dev/block/system on /apex/com.android.runtime type ext4 (ro,seclabel,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/sys/kernel/debug on /sys/kernel/debug type debugfs (rw,seclabel,relatime,mode=755)
configfs on /sys/kernel/config type configfs (rw,relatime)
none on /config type configfs (rw,nosuid,nodev,noexec,relatime)
bpf on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,relatime)
pstore on /sys/fs/pstore type pstore (rw,seclabel,nosuid,nodev,noexec,relatime)
tracefs on /sys/kernel/debug/tracing type tracefs (rw,seclabel,relatime)
/dev/block/data on /data type ext4 (rw,seclabel,nosuid,nodev,noatime,nodelalloc,resgid=1065,errors=panic,data=ordered)
/dev/block/cache on /cache type ext4 (rw,seclabel,nosuid,nodev,noatime,data=ordered)
/dev/block/param on /mnt/vendor/param type ext4 (rw,seclabel,nosuid,nodev,noatime,nodelalloc,errors=panic,data=ordered)
tmpfs on /storage type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,mode=755,gid=1000)
/dev/block/system on /apex/com.android.conscrypt@299900000 type ext4 (ro,seclabel,nodev,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/dev/block/system on /apex/com.android.conscrypt type ext4 (ro,seclabel,nodev,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/dev/block/system on /apex/com.android.media@290000000 type ext4 (ro,seclabel,nodev,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/dev/block/system on /apex/com.android.media type ext4 (ro,seclabel,nodev,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/dev/block/system on /apex/com.android.media.swcodec@290000000 type ext4 (ro,seclabel,nodev,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/dev/block/system on /apex/com.android.media.swcodec type ext4 (ro,seclabel,nodev,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/dev/block/system on /apex/com.android.resolv@290000000 type ext4 (ro,seclabel,nodev,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
/dev/block/system on /apex/com.android.resolv type ext4 (ro,seclabel,nodev,relatime,block_validity,delalloc,barrier,user_xattr,acl,inode_readahead_blks=8)
tmpfs on /system/bin type tmpfs (rw,seclabel,relatime)
adb on /dev/usb-ffs/adb type functionfs (rw,relatime)
mtp on /dev/usb-ffs/mtp type functionfs (rw,relatime)
ptp on /dev/usb-ffs/ptp type functionfs (rw,relatime)
/dev/block/data on /data/app/com.google.android.youtube-WqeeAn6DkEx9nZuOps1aKg==/base.apk type ext4 (rw,seclabel,nosuid,nodev,noatime,nodelalloc,resgid=1065,errors=panic,data=ordered)
/data/media on /mnt/runtime/default/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=1015,multiuser,mask=6,derive_gid,default_normal)
/data/media on /storage/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=1015,multiuser,mask=6,derive_gid,default_normal)
/data/media on /mnt/runtime/read/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=23,derive_gid,default_normal)
/data/media on /mnt/runtime/write/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=7,derive_gid,default_normal)
/data/media on /mnt/runtime/full/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=7,derive_gid,default_normal)
tmpfs on /mnt/runtime/default/emulated/0/Music type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,mode=755,gid=1000)
tmpfs on /storage/emulated/0/Music type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,mode=755,gid=1000)
tmpfs on /mnt/runtime/read/emulated/0/Music type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,mode=755,gid=1000)
tmpfs on /mnt/runtime/write/emulated/0/Music type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,mode=755,gid=1000)
tmpfs on /mnt/runtime/full/emulated/0/Music type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,mode=755,gid=1000)
It's funny that I can't see the linux mounts in android - probably because Linux Deploy creates a new mount namespace...
I'll try to map /sys and /dev directly from Linux Deploy and report back. I'll throw in /proc for good measure...