Safari 26 on iPhone and iPad makes many websites feel more like native apps....

https://aged-wiki.win/index.php/How_Do_I_Know_if_a_Home_Screen_Icon_is_a_Web_App_or_Just_a_Shortcut%3F

Safari 26 on iPhone and iPad makes many websites feel more like native apps. When you add a site to your Home Screen, it now uses 'Open as Web App' by default