I will never understand why adding a page to your homescreen in Safari goes like:
1. tap three dots
2. tap "Share"
3. tap "More"
4. scroll down
5. tap "Add page to home screen"
6. tap "Add to home screen"
other than that apple really doesn't want you to do this because they loathe PWAs and their entire services business model is built around the app store being the sole place of app distribution