For putting in a full run, would it be possible for it to be a duos run or would it have to be solo? Either or I can do it, but my friend wants to support me either way, so I just wanted to ask in case.

I'm pretty sure they would want a solo run most likely if you can do singleplayer.

I think duo runs would be awesome to add, makes it more fun and team-like, but solo might be easier to manage for the leaderboard. geometry dash scratch