zpool not imported on boot (systemd?)

[Freeaqingme]

I have a Debian 11 install, running a 5.10.158 kernel with ZFS 2.1.7-1 built in. Everything works just fine, except that my zpool isn't automatically imported on boot. I suspect this is due to some Systemd behavior that I cannot really lay my finger on.

The /etc/zfs/zpool.cache file is present and filled.

# systemctl status zfs-import-cache                
● zfs-import-cache.service - Import ZFS pools by cache file
     Loaded: loaded (/lib/systemd/system/zfs-import-cache.service; enabled; vendor preset: enabled)
     Active: inactive (dead)
       Docs: man:zpool(8)

I think this is the problem, that for some reason this service isn't run at boot. But I can't figure out why it won't start this (oneshot) service.

systemctl cat zfs-import-cache
# /lib/systemd/system/zfs-import-cache.service
[Unit]
Description=Import ZFS pools by cache file
Documentation=man:zpool(8)
DefaultDependencies=no
Requires=systemd-udev-settle.service
After=systemd-udev-settle.service
After=cryptsetup.target
After=multipathd.service
After=systemd-remount-fs.service
Before=zfs-import.target
ConditionFileNotEmpty=/etc/zfs/zpool.cache
ConditionPathIsDirectory=/sys/module/zfs

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/sbin/zpool import -c /etc/zfs/zpool.cache -aN $ZPOOL_IMPORT_OPTS

[Install]
WantedBy=zfs-import.target

Even if I remove the conditions from this file it still does not make a difference.

dmesg | grep -i zfs -C3
[    2.561135] Key type blacklist registered
[    2.561213] workingset: timestamp_bits=36 max_order=27 bucket_order=0
[    2.562300] zbud: loaded
[    2.701563] ZFS: Loaded module v2.1.7-1, ZFS pool version 5000, ZFS filesystem version 5
[    2.702025] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    2.702326] fuse: init (API version 7.32)
[    2.703131] integrity: Platform Keyring initialized

Journalctl does not show anything either for this service.

And when I run it manually, it just runs fine:

# systemctl start zfs-import-cache
# systemctl status zfs-import-cache
● zfs-import-cache.service - Import ZFS pools by cache file
     Loaded: loaded (/lib/systemd/system/zfs-import-cache.service; enabled; vendor preset: enabled)
     Active: active (exited) since Mon 2022-12-12 11:38:30 UTC; 2s ago
       Docs: man:zpool(8)
    Process: 5357 ExecStart=/sbin/zpool import -c /etc/zfs/zpool.cache -aN $ZPOOL_IMPORT_OPTS (code=exited, status=0/SUCCESS)
   Main PID: 5357 (code=exited, status=0/SUCCESS)
        CPU: 38ms

Dec 12 11:38:30 hpv4 systemd[1]: Starting Import ZFS pools by cache file...
Dec 12 11:38:30 hpv4 systemd[1]: Finished Import ZFS pools by cache file.

Any idea why this service does not want to start on boot by itself?