This is actually an extension of an older post in 2021.
Just like in Firefox, it would be a big improvement to have the ability to add separators between bookmarks.
Especially with longer lists, the human eye cannot focus directly on the desired bookmark.
Sorting alphabetically may be easier to find, but it's not always desirable if you want to keep certain bookmarks together. In addition, creating countless subfolders is not the solution either.
This would be a real UI improvement to make using Opera more intuitive
I hope you will use this suggestion.