I have attached some object to my character but the collision with that object is not working. both have collider and I have verified it. Why the character collider is working and the object attached to it is not working. I have made character parent and object as a child.
Collision only occurs if you spawn that object. That way though the spawned object becomes an individual one, independent of the parent one. If this would not work for your application you may can consider to use the Link tool, so you link "sibling objects" together on the scene editor.