yes.
First you’ll need to know the topic number of the topic you want to move it to :
this is normally on the top right of the topic when displaying or
Dashboard>topics>all topics and hover over edit of the topic, and you’ll see the url of the topic in the bottom left of your screen, with the post number
then
Dashboard>replies>all replies and go into edit for the reply you wish to move
On the right hand side you’ll see the topic number, change this to the desired topic number
This would be managed very elegant with autosugest/autocomplete search and select field in backend.
As ACF select field, or post objects field do it. I mean those 2 input fields in metabox for “Topic” and “Reply to” (user ?). Server limit is problem for classic select, but also huge view too. So search field with autocomplete would be prefect. It would i believe remove for long time all feature requests from users, to make it more manageable.