These are the most supported devices, maintained by at least 2 people and have the functions you expect from the device running its normal OS, such as calling on a phone, working audio, and a functional UI.
If the below is where we are at still with PostmarketOS, it will be a decade or more before it is anything more than a curiosity.
ExLisper@lemmy.curiana.net 2 weeks ago
As I said, I don’t think we can expect PostmarketOS to work on normal phones but looking at the table they have PinePhone figured out. My hope is that we will soon see something like PinePhone but with proper specs that will actually be usable and that some phone makes like Fairphone will help make PostmaketOS run on their phones. Couple of properly supported models is all we really need and I hope it’s couple of years away, not a decade.