Safari 26 helps websites feel more like apps when you use them on iPhone and...

https://www.bookmark-suggest.win/safari-26-changes-how-websites-work-on-iphone-and-ipad-by-making-them-feel-more

Safari 26 helps websites feel more like apps when you use them on iPhone and iPad. When you add a site to your Home Screen, it can now open in a cleaner, app-like view without the usual browser bars