Hi @a
What do you mean by a linux phone?
Android use Linux and there is project like grapheneOs that are based on Android.
There is also other project that doesn't use android, only Linux, like #postmarketos. They are very differents.
@a be careful. Yes you can run GrapheneOS as a stripped down android. By default there is none of the well known apps from Google installed. You will find repots about the superior data privacy of that setup.
And you will find reports from people not missing anything on grapheneOS. These people run Google apps. Lose a huge part of privacy but still have superior defence against intelligence agencies.
I regard those two setups as incompatible. Just like two different custom ROM.