@brazzerstop can you share link to your forum so I can get idea of format and number of posts?
I think can write widget to read all posts, and re-order them.
I did a small test of this, with the idea that just admin has access to view widget, with click to sort button.

Technical thoughts:
What is possible is to read all topicd or posts with write API, e.g.
https://community.nodebb.org/api/v3/posts/{pid}
delete them, sort, then rewrite
But its not best method because new post ids are made.
I have been wondering whether a bubble sort routine working directly on the database post number field might work. Saves re-writing records, only swapping that field.
Up till now Ive never managed to get direct Mongo API calls working.
The NodeBB API however is quite easy to use

@brazzerstop said in [manual] Build a Dock Panel:

If you mean show "select category" on every category/topic page, I think no.

yep It's that what I mean, I have testing with category number 0 but don't working