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

https://www.logo-bookmarks.win/safari-26-changes-how-websites-work-on-your-iphone-and-ipad-by-making-many-of

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