GitHub.com as source. This is currently possible today, with iOS ides like Pythonista, Beeware, and Kivy. you don't get a neat app to s distribute but you can run python code on iOS today. This PEP is to make iOS a supported platform for the reference implementation, CPython.

With theos, and I install them through SideStore or directly sideload them as a dev on my device. I could use App Store Connect if I had a dev account for that too