Is it possible to move objects inside this objects panel/Scene collection? I have now a Camera as a 1st object, 2nd is Cylinder and 3rd is Cube, but I want to arrange them differently. Is that possible? Or do I have to create first a Collection for each of the objects?
In 2.9 and later it is somewhat possible, but it is difficult.
First, you have to disable "Sort Alphabetically":
Then there is no way to drag objects around within a collection. So you have to remove objects from the collection and return them, knowing that each object added to a collection is added to the front of the collection list.