Safari 26 on iPhone and iPad helps websites feel more like apps you’ve...

https://wiki-global.win/index.php/Why_Does_My_Web_App_Look_Fine_on_Desktop_but_Awkward_on_iPhone%3F

Safari 26 on iPhone and iPad helps websites feel more like apps you’ve installed. When you add a site to your Home Screen, it now opens without the usual browser bars, giving you more screen space and a cleaner look