I've been making a iOS app which makes iOS apps. You can live preview your app instantly, and it integrates with git. (Right now, the git feature is only on the Testflight version, not the store version). https://apps.apple.com/us/app/app-maker-build-native-apps/id...
And yes I’ve thought about that, but I don’t know how to share a file system...yet.
And it’s real. I have a general solution for tricking SwiftUI to render different views at runtime. Some things are fake (such as photos) because I wanted it to work for a demo but I didn’t have things like a file system setup.