No, PWA add to homescreen is since 11.3
https://dockyard.com/blog/2017/09/27/encouraging-pwa-install...
They do even auto-delete the PWA-apps
[Quote]
If the user doesn’t use the app for a few weeks, iOS will free up the app’s files. The icon will still be there on the home screen, and when accessed the app will be downloaded again.
Not very trustworthy for using a PWA on iOS it seems :)