Thanks for giving the information that you can. Here’s my $0.02.
I (somewhat foolishly) bought a Pixel 5a without even considering that Republic Wireless might not support it yet. So I’m disappointed, but not upset. I still use RW on my previous phone (Pixel 3, which I like, but the battery is not great and the camera is faulty from too many drops).
For the time being I have activated Google Fi on my new Pixel 5a, just to see what it’s like. I am considering moving my RW number there (it’s hard to really test a phone when no one knows the new number). If I move my number to Fi and RW adds support for the 5a, I would strongly consider switching back to RW. Our family has been on RW for 9 years, so this feels meaningful to me. As an aside, the main thing Fi has which RW lacks is international calling and roaming; but that is not a deal-killer for me, which is why I haven’t switched previously.