I think Apple needs to get back on the web app train and make iOS Safari more useable for people to do things in safari and not have to create a native application.
I'd argue it's really good in 2022. We only distribute our software as a web app these days. Many of our customers exclusively use iOS Safari to access it.
We even got the PWA stuff working reliably. Our web app runs full-screen on iOS devices and is launched from an icon on the home screen. For most users, there is absolutely zero difference between this and a native iOS app experience.
And contactpicker is behind an experimental flag. When are they launching it??
What more do you want :)
Google tends to do the same thing with Chrome or perhaps it's that frontend developers tend to implement Chrome experimental features a lot.
It would be great to deploy a simple site or PWA without a lot of catches where "if it's this browser do X or if it's another do Y.