Not sure at this moment how (and if I understand your screenshot correctly), yet quite sure that you can help yourself by using those two tools on your host computer, when your Librem 5 connected to it: Fix broken phoc.ini - #2 by dcz. Once picocom runs there please introduce yourself to relevant (perhaps) content of: Tutorial: Full disk encryption on Librem5.
Second (similar resize partition approach related or at least to make more available/working space on this Librem 5 /home) tool (using already installed uuu package) that easily needed there would be (please search this Forum on how-to):
P.S. I’m continuing to guess what needed there but anyway trying to help somehow,