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

https://wiki-coast.win/index.php/Can_Safari_Web_Apps_Remember_My_Login_Like_a_Real_App%3F

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