Attach multiple objects to multilple sockets

i am new to unreal and I would like to know if there is a way in vr to attach an object to multiple sockets.
For example I have to decorate a Christmas tree with balls, in particular move the balls to my liking on sockets and then also swap them between the sockets

Yes, very possible to do. Go add the sockets to your tree then just move the balls to the sockets locations.

Thank you for the answer.
I tried with different sockets and different balls but they always stick to the same socket all together

what do you mean they stick the to the same socket all together? All your balls go to the same socket? each socker has it own location and it must be relative to the tree, not world. Move them in relative location.