Safari 26 helps many websites feel more like real apps on your iPhone and iPad....

https://highstylife.com/how-do-i-add-a-website-to-my-ipad-home-screen-and-make-it-feel-like-an-app/

Safari 26 helps many websites feel more like real apps on your iPhone and iPad. When you add a site to your Home Screen, it can open in a special full-screen mode without the usual browser bars getting in the way