To be fair and just to leave it on this thread...
I think it's called "power duplicating" where you need to copy your "object" with control / command + J.
Then you can for example move the copied object next to the original object, plus whatever spacing you desire.
Once that's done, for every time you press control J, the next duplicated objects will now copy that offset to the previous object (hopfully that makes sense)
This effectively acheives the same thing as the repeat grid in XD.
Probably there is a way to go back later and edit the spacing between these objects as you can with repeat grid, but I've not researched that far.
