How combine body animation from mixamo with facial MOCAP from blender?

I’m just starting in UE4 and it feels like exploring a vast ocean.

I’ve successfully imported body animations from mixamo and facial animations from bender. Both are working fine but using two different mesh/character(2 different skeletal mesh). I want to combine the body and facial animation into one working mesh/character.

Any idea where to start? Do I need to separate the body from the head?

Thank You.