Child objects don't move with parent

Question

So, i used Archimesh addon, to create curtains, but they have been created in the wrong collection.

But when i try to move it into the another collection, every child inside of a Venetian Frame stays in a Lighting collection.

Any ways to fix that? I can't select every single one of them, since those objects are parents too.

Answer 1

That's the way it works, children won't follow their parent unless you select them, what you can do is right click on the parent and choose > Select Hierarchy, then move to the collection you want.