The “Add to Home Screen” feature for bookmarks is not working in Safari on iOS 26.
Add to Home Screen is not working in Safari on iOS 26.
You should probably raise this as a bug in the usual way. It won't really get progressed if it's only posted in these Developer Forums.
You need to raise each issue you find separately at https://feedbackassistant.apple.com/ You can post the FB numbers here if you want, so that others can link to them.