Where is the function "Add to reading List" or "Add Bookmark" in the safari browser web address field.

They are in the "Share" menu.

click here ➜ Keep a Reading List in Safari on MacOS Sequoia - Apple Support

Same here on Safari Version 18.0 (19619.1.26.111.10, 19619) macOS Sonoma.

I really hope this is a bug not a „feature“ as it’s still working on the latest Safari Technology Preview Release 203 (Safari 18.0, WebKit 19620.1.6).

Bookmarking into folders would be a real hassle. The "Share" menu is no alternative as it remembers the last used folder…

Still can’t see how this is an alternative.

1. Click on the „Share“ menu

2. Click on „Add Bookmark“

3. Click on „Bookmarks“

4. Scroll to the folder you want to bookmark to

5. Click on „Add“

vs

1. Click on the + in the address field

2. Scroll to the folder you want to bookmark to & get your finger off the trackpad

(& the used folder will not become the default folder used the next time you hit Cmd-D to bookmark just in "Bookmarks" in no specific folder...)

This is not a good update.

I don't even have the Share menu as an option. Update: NOW I see how to edit the menu bar. Not intuitive. But, whatever.

Use the keyboard shortcut "Shift/Command/D" for adding to the reading list.