Safari 26 brings a smoother, more app-like feel to websites on iPhone and iPad....

https://lanescooljournal.inkharbory.com/posts/what-is-the-best-example-of-a-demanding-web-app-that-proves-the-point

Safari 26 brings a smoother, more app-like feel to websites on iPhone and iPad. When you add a site to your Home Screen, it now launches more like a native app without the usual browser bars cluttering the screen