Can one o more mesh condivide the same scheleton?

hi guys I wanted to make a Question, can i use the same scheleton for two static mash?
this is my problem

i want to attack the arm to the body but i want that the arm use the same scheleton of the body

I tried to use the tool “add body parts” to a mesh but can not find the arm

how can I do it? i can use two meshes with the same skeleton? or i need to use SkeletalMeshSockets and attack the arm to the body and use the same animation [state machine][4] for driven the animation? and if anyone can help me, I’m new to this world.

Thank you for your time