Google is guilty of plenty of things, but holding back the web as a first rate development platform is not one of them, and I think the blame falls squarely on Apple's shoulders here.
Just look at what you can do with a PWA on Android. Most importantly, unlike on iOS, you can receive push notifications. But you can also do things like ship a PWA directly to the Play Store, access all sorts of native browser libraries like Bluetooth support and Add to Home Screen.
If you look at non-gaming apps, I'd estimate about 90% of them could be straightforwardly implemented as PWAs. The reason they're not is due to deliberate decisions by Apple not to support the tech that would make that possible, like push notifications.