But even aside from Apple's lack of support, the PWA standard seems kinda bad. Weird boilerplate like the serviceworker.js even if all you want is to make it addable to home screen.
Idk about iOS
"normally" is carrying a lot of water there. While the back-end is shared, obviously, a large number of orgs have two distinct fully native development projects for the platforms. There are zero empirical metrics I can cite, but in my experience the cross platform thing is a minority. Cross platform tooling is often the talk among the aspirational "One day I'm going to write a novel, and then a hit app" sorts, but it just doesn't dominate in the actual industry.
But if it did, Flutter dominates the cross-platform world, and what do you know, Flutter can generate PWA apps.
>But even aside from Apple's lack of support
Apple has supported PWA for a couple of years. It was a lazy excuse by cheerleaders who had nothing factual, but Apple supporting PWAs didn't move the needle at all. Because it turns out that a billion Android devices not being targeted with PWAs had literally nothing to do with Apple.