I’ll have to study your suggestion. It seems to be a common issue in Qubes OS. On nvme m2 ssd it takes about 6 minutes before the login:
@dom0 ~]$ systemd-analyze blame
1min 57.881s qubes-vm@sys-whonix.service
1min 28.729s qubes-vm@sys-firewall.service
55.223s plymouth-quit-wait.service
52.833s qubes-vm@sys-net.service
42.687s qubes-vm@sys-usb.service
35.099s dracut-initqueue.service
34.080s systemd-cryptsetup@luks\x…>
30.254s systemd-cryptsetup@luks\x…>