Add limbs to humanoid actor

Hi, I’m new to UE so I don’t know if it is right to ask this but: is it possible to add more limbs to humanoid actors? Like 2 extra arms behave similarly to the original arms but separately.

Are they permanently attached or can be attached/changed in the level?

Sorry for late reply.

If I could know about both, I would appreciate it. Both have their own use.