There are a lot of PWAs packaged as mobile apps, probably more than you realize. Google makes this pretty seamless with TWAs, and you can use Capacitor/Cordova on iOS. You can even connect/write your own JavaScript interfaces to native APIs.

FWIW, in the US, PWAs are a non-starter for most apps due to Apple having so much marketshare and having horrendous UX for installing them. Anytime you have to provide your users "instructions" to do something on iOS, you've lost (and it's by design).