As already mentioned, postmarketOS is probably closest to what you want for an open source android replacement, though it’s still not 100% there if you’re looking for a perfect alternative.
Personally I’m going to try it out as a daily driver when I can get a cheap pixel 8 when the 9 comes out later this year
Anecdotal, but for me worked a lot better with my monitors (both the same exact model though). On plasma 5 they had trouble waking up after suspending
Windows->Mac->Ubuntu->Fedora->Arch->openSUSE->and finally Debian when bookworm released and I’ve been very happy with it, plan on staying for the foreseeable future.
Still dual boot windows (with no Microsoft account connected) for gaming. But I don’t game nearly as much as I used to and when I do I don’t want to worry about anything working, I just want to ply with friends. Though from what I hear gaming on Linux is getting better all the time.