Safari 26 brings a smoother, app-like feel to many websites on 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 brings a smoother, app-like feel to many websites on iPhone and iPad. When you add a site to your Home Screen, it now opens without the browser’s usual bars and controls—just like a real app