Interesting… i plan in future make this for skeletons - reconnecting their bones…
Imo this is easy to do with animation (just reversed animation), but how you make your rock broken to 15 pieces, with destructible physics? If yes then im afraid this is not possible in blueprints, but if you find a way how to do it then share ideas
One more idea i have is when rock is destroyed, make 15 child actors and kick them off with impulse and then use some kind of manual reconnections with some “move component to” or location nodes…