Safari 26 brings a smoother app-like experience to many websites on your iPhone...

https://blogfreely.net/samuel-wang09/website-vs-app-from-a-user-perspective-does-it-even-matter-anymore

Safari 26 brings a smoother app-like experience to many websites on your iPhone and iPad. When you save a site to your Home Screen, it opens cleanly without the usual browser bars getting in the way