I have a multi-object structure (parents and children). In the Outliner, if I select objects and move them to a collection, it will move the object but NOT the child. So I have to select the hierarchy before moving to a collection. But I have multiple objects with their own children. How can I select the parents and select their hierarchies? I can only select a hierarchy for a single object. So to move multiple object with children to a collection I have to repeat the process for each of those parents.
Am I missing something?