I tried out postmarketOS + phosh on a PinePhone about a year ago. For my own needs, it worked fairly well, except (ironically) receiving calls. It was like driving an old car, everything was slightly jank, but worked, and could be tinkered with - see the entire review. I have to give credit that there has been impressive progress in mobile Linux since PinePhone’s release in 2019, and a lot of it was developed by unpaid hobbyists.