Adding a Bookmark doesn't give complete dropdown menu choices like before

https://community.brave.com/t/editing-name-and-folder-of-new-bookmarks/528195

From the main thread about the problem, it’s unlikely to change.

Although you can get the functionality back with this extension.
https://chromewebstore.google.com/detail/bookmark-plus/kcipcflegclplnkpbijedkhgljodgfcp

And don’t forget you can modify the shortcut here
brave://extensions/shortcuts

I used Ctrl + D