ssh to localhost. Because of containerization, will not work from regular shell.
If you get errors involving apt, do a "sudo mount -o rw,remount /"
from your non-ssh terminal.
If you can't ssh to local host, do a purge and reinstall open-ssh from your non-ssh terminal. don't forget to start ssh service, but this should happen automatically anyway
You will be able to create a libertine container. But the applications installed probably still won't work. They don't on the pinephone.
Finally, change your update channel to dev. There are 800 later builds than on the stable channel.