Safari 26 helps websites feel more like native apps on your iPhone and iPad....

https://www.stall-bookmarks.win/safari-26-brings-a-big-improvement-to-how-websites-work-on-iphone-and-ipad-by

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