Safari 26 on iPhone and iPad improves how websites work when saved to your Home...

https://www.acid-bookmarks.win/safari-26-on-iphone-and-ipad-makes-websites-feel-more-like-apps-by-improving

Safari 26 on iPhone and iPad improves how websites work when saved to your Home Screen. With the new ‘Open as Web App’ option, sites launch full-screen without browser bars, making them feel more like standalone apps