I see, well I just found it in some stackexchange answer to be honest, it was an accepted answer that seemed to work for some people to start systemd-homed when their sudo was failing the same way mine is, but it isn’t working for me.
$ cat /etc/pam.d/system-auth
#%PAM-1.0
auth required pam_faillock.so preauth
# Optionally use requisite above if you do not want to prompt for the password
# on locked accounts.
-auth [success=2 default=ignore] pam_systemd_home.so
auth [success=1 default=bad] pam_unix.so try_first_pass nullok
auth [default=die] pam_faillock.so authfail
auth optional pam_permit.so
auth required pam_env.so
auth required pam_faillock.so authsucc
# If you drop the above call to pam_faillock.so the lock will be done also
# on non-consecutive authentication failures.
-account [success=1 default=ignore] pam_systemd_home.so
account required pam_unix.so
account optional pam_permit.so
account required pam_time.so
-password [success=1 default=ignore] pam_systemd_home.so
password required pam_unix.so try_first_pass nullok shadow sha512
password optional pam_permit.so
-session optional pam_systemd_home.so
session required pam_limits.so
session required pam_unix.so
session optional pam_permit.so
There were a lot of repeats of the log entries I mentioned about pam, but besides that these are all the entries I could find:
$ journalctl -b0 | grep pam
ágú 08 22:53:24 Thulebox sddm-helper[825]: gkr-pam: no password is available for user
ágú 08 22:53:24 Thulebox sddm-helper[825]: pam_kwallet5(sddm-autologin:auth): pam_kwallet5: pam_sm_authenticate
ágú 08 22:53:24 Thulebox sddm-helper[825]: pam_kwallet5(sddm-autologin:auth): pam_kwallet5: Couldn't get password (it is empty)
ágú 08 22:53:24 Thulebox audit[825]: USER_AUTH pid=825 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='op=PAM:authentication grantors=pam_faillock,pam_shells,pam_permit,pam_gnome_keyring acct="user" exe="/usr/lib/sddm/sddm-helper" hostname=? addr=? terminal=? res=success'
ágú 08 22:53:24 Thulebox sddm-helper[825]: pam_systemd_home(sddm-autologin:account): systemd-homed is not available: Unit dbus-org.freedesktop.home1.service not found.
ágú 08 22:53:24 Thulebox audit[825]: USER_ACCT pid=825 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='op=PAM:accounting grantors=pam_access,pam_unix,pam_permit,pam_time acct="user" exe="/usr/lib/sddm/sddm-helper" hostname=? addr=? terminal=? res=success'
ágú 08 22:53:24 Thulebox sddm-helper[825]: pam_kwallet5(sddm-autologin:setcred): pam_kwallet5: pam_sm_setcred
ágú 08 22:53:24 Thulebox audit[825]: CRED_ACQ pid=825 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_shells,pam_permit,pam_gnome_keyring acct="user" exe="/usr/lib/sddm/sddm-helper" hostname=? addr=? terminal=? res=success'
ágú 08 22:53:24 Thulebox sddm-helper[825]: pam_unix(sddm-autologin:session): session opened for user user(uid=1000) by (uid=0)
ágú 08 22:53:24 Thulebox sddm-helper[825]: pam_unix(sddm-autologin:session): session opened for user user(uid=1000) by (uid=0)
ágú 08 22:53:24 Thulebox systemd[827]: pam_systemd_home(systemd-user:account): systemd-homed is not available: Unit dbus-org.freedesktop.home1.service not found.
ágú 08 22:53:24 Thulebox audit[827]: USER_ACCT pid=827 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='op=PAM:accounting grantors=pam_access,pam_unix,pam_permit,pam_time acct="user" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
ágú 08 22:53:24 Thulebox systemd[827]: pam_warn(systemd-user:setcred): function=[pam_sm_setcred] flags=0x8002 service=[systemd-user] terminal=[] user=[user] ruser=[<unknown>] rhost=[<unknown>]
ágú 08 22:53:24 Thulebox systemd[827]: pam_unix(systemd-user:session): session opened for user user(uid=1000) by (uid=0)
ágú 08 22:53:24 Thulebox systemd[827]: pam_unix(systemd-user:session): session opened for user user(uid=1000) by (uid=0)
ágú 08 22:53:24 Thulebox systemd[827]: pam_env(systemd-user:session): deprecated reading of user environment enabled
ágú 08 22:53:24 Thulebox audit[827]: USER_START pid=827 uid=0 auid=1000 ses=2 subj==unconfined msg='op=PAM:session_open grantors=pam_loginuid,pam_loginuid,pam_keyinit,pam_systemd_home,pam_limits,pam_unix,pam_permit,pam_unix,pam_mail,pam_systemd,pam_env acct="user" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
ágú 08 22:53:24 Thulebox sddm-helper[825]: pam_env(sddm-autologin:session): deprecated reading of user environment enabled
ágú 08 22:53:24 Thulebox sddm-helper[825]: gkr-pam: couldn't unlock the login keyring.
ágú 08 22:53:24 Thulebox sddm-helper[825]: pam_kwallet5(sddm-autologin:session): pam_kwallet5: pam_sm_open_session
ágú 08 22:53:24 Thulebox sddm-helper[844]: pam_kwallet5: final socket path: /run/user/1000/kwallet5.socket
ágú 08 22:53:24 Thulebox audit[825]: USER_START pid=825 uid=0 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_open grantors=pam_loginuid,pam_keyinit,pam_systemd_home,pam_limits,pam_unix,pam_permit,pam_unix,pam_mail,pam_systemd,pam_env,pam_gnome_keyring,pam_kwallet5 acct="user" exe="/usr/lib/sddm/sddm-helper" hostname=? addr=? terminal=:0 res=success'
ágú 08 22:53:27 Thulebox plasma_session[883]: org.kde.plasma.session: Starting autostart service "/etc/xdg/autostart/pam_kwallet_init.desktop" ("/usr/lib/pam_kwallet_init")
ágú 08 22:53:27 Thulebox plasma_session[883]: org.kde.plasma.session: Starting autostart service "/etc/xdg/autostart/pamac-tray-plasma.desktop" ("/usr/bin/pamac-tray-plasma")
ágú 08 22:53:29 Thulebox sudo[1544]: pam_systemd_home(sudo:auth): systemd-homed is not available: Unit dbus-org.freedesktop.home1.service not found.