zfs mount is error free but no directory is present

Hello
In a 22.04 version installed in an EXT4 partition, I am trying to watch the contents of a 22.04 version installed in a ZFS partition.

I can't. However, I can easily access the "duplicate" of this partition which was created under ZFS.
I think it certainly needs an additional option that I can't find. But maybe this is a bug???

Can you help me. Thank you.

sudo blkid | grep zfs_member
/dev/sdb4: LABEL="rpool" UUID="3705767347231228268" UUID_SUB="17088151264315178202" BLOCK_SIZE="4096" TYPE="zfs_member" PARTUUID="4c7ee6a4-46e4-a244-83ad-744047de9184"
/dev/sdb3: LABEL="bpool" UUID="2280493683547443963" UUID_SUB="6738067129089399524" BLOCK_SIZE="4096" TYPE="zfs_member" PARTUUID="ab89c3ca-8125-dc40-83f9-2d1050c1251c"
/dev/sdc6: LABEL="poolSORTIE" UUID="10752972542097428173" UUID_SUB="3388036065267144189" BLOCK_SIZE="4096" TYPE="zfs_member" PARTUUID="2be01f36-25c3-463c-9ba2-fbbe0b0b9a45"

-------- On a duplicate partition of rpool all is good
sudo zpool import -f -N poolSORTIE Sortie; zpool list
NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
Sortie 19.5G 10.1G 9.36G - - 0% 51% 1.00x ONLINE -

sudo zfs set mountpoint=/mnt/Sortie Sortie
sudo zfs set canmount=on Sortie
sudo zfs mount Sortie
ls /mnt/Sortie
bin boot cdrom dev etc home lib lib32 lib64 libx32 media mnt opt proc

sudo zpool export Sortie ; zpool list
no pools available
ls /mnt/Sortie

---------- On the rpool partition, No directory is visible.
sudo zpool import -f -N rpool Root; zpool list
NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
Root 920G 5.00G 915G - - 0% 0% 1.00x ONLINE -

sudo zfs set mountpoint=/mnt/Root Root
sudo zfs set canmount=on Root
sudo zfs mount Root
ls /mnt/Root

However no error on the mount action

janv. 27 09:43:51 b sudo[8050]: a : TTY=pts/1 ; PWD=/home/a ; USER=root ; COMMAND=/usr/sbin/zpool import -f -N rpool Root
janv. 27 09:43:51 b sudo[8050]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=1000)
janv. 27 09:43:55 b zed[8214]: eid=37 class=config_sync pool='Root'
janv. 27 09:43:55 b zed[8216]: eid=38 class=pool_import pool='Root'
janv. 27 09:43:55 b zed[8238]: eid=40 class=config_sync pool='Root'
janv. 27 09:43:55 b sudo[8050]: pam_unix(sudo:session): session closed for user root
janv. 27 09:44:59 b sudo[8360]: a : TTY=pts/1 ; PWD=/home/a ; USER=root ; COMMAND=/usr/sbin/zfs set mountpoint=/mnt/Root Root
janv. 27 09:44:59 b sudo[8360]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=1000)
janv. 27 09:45:00 b sudo[8360]: pam_unix(sudo:session): session closed for user root
janv. 27 09:45:00 b sudo[8376]: a : TTY=pts/1 ; PWD=/home/a ; USER=root ; COMMAND=/usr/sbin/zfs set canmount=on Root
janv. 27 09:45:00 b sudo[8376]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=1000)
janv. 27 09:45:00 b sudo[8376]: pam_unix(sudo:session): session closed for user root
janv. 27 09:45:00 b sudo[8387]: a : TTY=pts/1 ; PWD=/home/a ; USER=root ; COMMAND=/usr/sbin/zfs mount Root
janv. 27 09:45:00 b sudo[8387]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=1000)
janv. 27 09:45:00 b sudo[8387]: pam_unix(sudo:session): session closed for user root

sudo zpool export Root ; zpool list
ls /mnt/Root

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: zfsutils-linux 2.1.2-1ubuntu1
ProcVersionSignature: Ubuntu 5.15.0-17.17-generic 5.15.12
Uname: Linux 5.15.0-17-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu76
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Jan 27 10:33:07 2022
InstallationDate: Installed on 2021-11-01 (86 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Alpha amd64 (20211031)
SourcePackage: zfs-linux
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.sudoers.d.zfs: [inaccessible: [Errno 13] Permission non accordée: '/etc/sudoers.d/zfs']