Safari 26 helps many websites feel more like apps when you use them on iPhone...

https://www.bookmarking-presto.win/safari-26-lets-websites-on-your-iphone-and-ipad-feel-more-like-real-apps-when

Safari 26 helps many websites feel more like apps when you use them on iPhone and iPad. When you add a site to your Home Screen, it can launch without the browser chrome, giving you a cleaner, app-like experience