You need to switch on the Party Vision and movement option in FGU if you want players to be able to move the NPC tokens.
Printable View
Of course the problem with that is any PC can move any token and see what that token can see. I am trying to have a PC control a familiar. Is there maybe an extension or something that can help here.
EDIT> I just found one of your videos on sharing NPCs from last year and that is what I have been trying. Have things changed since then so it no longer works?
That video was made a while ago and was made for Classic. So, yes, things have changed in Unity. As noted if you want them to control the NPCs you'll need to switch in Party vision. You could look into this extension https://forge.fantasygrounds.com/shop/items/170/view
Thanks Zacchaeus. That extension did the trick. Much appreciated.