Safari 26 brings a smoother, app-like feel to many websites on iPhone and iPad....

https://wiki-cafe.win/index.php/How_Do_I_Add_a_Website_to_My_iPhone_Home_Screen_the_Right_Way%3F

Safari 26 brings a smoother, app-like feel to many websites on iPhone and iPad. When you add a site to your Home Screen, it now opens in a clean, distraction-free window without browser bars