Earlier quoted context omitted.
You can't complain about availability of phones (or any electronics) while being in the US. Try living anywhere else like Canada.
We have decent variety in the US, but I think it's fair to want phones for specific purposes that aren't generally served here. The more repairable phones are hard to come by, and as someone who likes trying alternative OSes the phones that seem best served by e.g. Ubuntu Touch (Volla Phone and Fairphone) aren't available.
You're overestimating the Volla phone and Fairphone, 1st one still doesn't support VoLTE which I heard is essential in the US, 2nd thing isn't even recommended by UT.[1]
Either go with an Xperia + SailfishOS [2] if you want more than a toy or Pinephone + PmOs [3] if you love to tinker on your daily driver. Both have VoLTE support.
1. https://devices.ubuntu-touch.io/
3. https://wiki.postmarketos.org/wiki/PINE64_PinePhone_(pine64-...