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

https://www.adirs-bookmarks.win/safari-26-changes-how-websites-work-on-iphone-and-ipad-by-making-them-feel-more

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