[cageface]

From the article:

There is no native app for The Session, but you can install it on your phone nonetheless. Lots of people have done that. After a while they forget that they didn’t install it from an app store: it behaves just like any other app on their homescreen.

Maybe you don't believe this but it was addressed.

[iainmerrick]

I thought PWAs already didn't work well on iOS, though?

Apart from opening in a browser window rather than as a full-screen app, is this going to behave significantly differently from before?

[cageface]

Apple has made some significant improvements in their handling of PWAs recently, most notably supporting push notifications. Which makes their recent moves even more discouraging.

https://www.thisdot.co/blog/the-renaissance-of-pwas