While I have to apologize for not being able to provide you with any help for the problem at hand I just wanted to note that if you open up identical public threads via a reddit account and via a lemmy account at the same time then those two accounts are then, for data analysis purposes, connected for all eternity. You might as well not bother using different nicknames.
If that isn’t a concern to you then just ignore my ramblings.

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.