Do you really want Linux phones?
The community around Linux phones is interesting. The phones do sell to a lot of people, but it seems a lot of those people come back to complain that Linux phones isn't what they expected it is.
For some reason all the distributions for the PinePhone are bending over backwards to provide an Android or iOS experience on the phone. The operating systems are judged on the amount of apps preinstalled and every tiny issue labels the distribution as completely unusable.
Stability doesn't matter at all, as long as there are features! more features! Doesn't matter there are 20 patches on top of every package and things aren't upstreamed. Doesn't matter if the kernel is full of hacks with no upstream in sight for most things.
The currently available true' Linux phones do not seem to be, well, any good. They've got a lot of work ahead of them, and anybody expecting a fully functioning smartphone experience from the PinePhone or Librem 5 will be disappointed. I have no clue about possible solutions to this problem.