I think they ought to put up a list somewhere of the newest devices they support with at least decent support such as your standard calling, texting, media, etc.

pmOS does have a list of supported devices, and for the list labeled "main" support, it's empty, as they do not deem any if their currently supported devices (in the "community" or "testing" sections) to be usable/stable enough for daily use for the average person. Of the supported devices, it's clearly labeled what does and doesn't work for each device

Other spins like Mobian and Ubuntu Touch have similar pages too!