@LeonidS So I have spent the last few hours trying to figure out somethings, and I think this feature was forgotten and never finished.

Under posts, content item, favorite, I added a folder called "Private" and set privacy as friends. Added the post to this new favorite folder "Private".

If I navigate to posts-favorites it shows the "Default" folder only, with no way to navigate, and my favorite is just missing?

I have no way to display these new folders?

I would like to add a my favorites block to profile pages, but it doesn't exist.

There is nowhere to manage these?