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

https://astro-wiki.win/index.php/Do_Web_Apps_Reduce_Update_Headaches_Compared_to_Native_Apps%3F

Safari 26 makes websites on iPhone and iPad feel a lot more like native apps. When you add a site to your Home Screen, it opens without the usual browser interface—no address bar or tabs—giving you a cleaner and more focused experience