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

https://front-wiki.win/index.php/Website_vs_App_from_a_User_Perspective:_Does_It_Even_Matter_Anymore%3F

Safari 26 lets websites feel more like native apps on your iPhone and iPad. When you add a site to your Home Screen, it opens without browser bars or tabs, giving you a cleaner, full-screen view