Safari 26 brings websites closer to app-like experiences on iPhone and iPad by...

https://star-wiki.win/index.php/How_Do_I_Add_a_Website_to_My_iPhone_Home_Screen_the_Right_Way

Safari 26 brings websites closer to app-like experiences on iPhone and iPad by improving how they behave when added to the Home Screen. With the new "Open as Web App" feature, sites launch in a clean, standalone window without browser bars or distractions