Unless it can natively run all the existing ready-to-go Pi images and software packages and will also receive community support when I ask for help in a Pi-adjacent forum it’s not really going to be a competitor to the Pi. The hardware is pretty much irrelevant.

Do you get a public IP with Starlink?

You’ve very likely already encountered it if you have a device with a SIM card! Most any mobile provider routes via a CGNAT - it’s exceedingly rare for phones to have public IPs.