Yes.
I commented on the same issue here: Librem 5 — painpoint assessment 2021 - #52 by irvinewade You might want to review that entire topic.
Not sure about that one but I think you need to do more than just set the same password. (?Needs PAM config and the right thing to be installed?) I expect this is just a gap at the moment.
Whether it is at all desirable from a security point of view to do this is another question. I myself would not do this. Just sayin’
I believe that you can do this but there is no user-friendly GUI for it. This is a known gap. In my opinion, this is something that should be fixed.
Known behaviour. Well ventilated already. e.g. Librem 5 — painpoint assessment 2021 - #53 by irvinewade