Safari 26 on iPhone and iPad helps websites act more like real apps. When you...

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

Safari 26 on iPhone and iPad helps websites act more like real apps. When you add a site to your Home Screen, Safari offers an 'Open as Web App' option that lets the site run without the usual browser bars