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

https://ericksexcellentblog.image-perth.org/how-do-i-add-a-website-to-my-iphone-home-screen-the-right-way

Safari 26 makes websites feel more like native apps on your iPhone and iPad. When you add a site to your Home Screen, it now behaves like a standalone app without the browser’s address bar or tabs