would like to move an existing topic to a sub category.
no clue how to do that.
I guess there is no chance for you/us to do so.
I would ping an admin (no clue how to do that properly as not advertised!).
But @ jollaadmin (without the space may work). Or you give all infos which topic to which category and flag that topic for moderation (I could do as well ). And wait…
Flag for moderation is the way to go.