Can’t we disguise the PWA as a browser on the iOS App Store? So in theory it’s just another browser that only allows to open one website- the PWA. But on the surface, to the users it will be available as an app in App Store.
It is technically possible, of course, though I vaguely recall iOS App Store guidelines saying not to just wrap an existing website in a webview. On the flip side, PWA support in Safari has been gradually improving with better support for web manifests and web notifications, for example.