Hi, I just posted about a workaround for running scripts on iOS, maybe this helps: Running userscripts on iOS: a workaround
It’s not super quick and easy and you’ll have to connect your device to your MacBook once a week and upload the app again but it is the best I could figure out for people who don’t have an Apple Developer account.
Forgive my crabigator, for I have sinned. But for me it is Anki mode all the way.