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

https://lima-wiki.win/index.php/Does_Using_a_Web_App_Help_When_Switching_Between_iPhone_and_iPad%3F

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