Safari 26 on iPhone and iPad brings websites closer to apps by improving the...

https://www.novabookmarks.win/safari-26-brings-a-smoother-app-like-feel-to-many-websites-on-iphone-and-ipad

Safari 26 on iPhone and iPad brings websites closer to apps by improving the Home Screen experience. When you add a site to your Home Screen, it now opens using the new 'Open as Web App' mode