how to add metahuman face rig to existing animation? (and dont reset this animation)

how to add metahuman face rig to existing animation? (and dont reset this animation)
using bake animation sequence technic from latest UE version.
Eaxample:

metahuman is walking using Mixamo animation. I now how to add (using bake animation sequence) body control rig and animate head as adition to this walking sequence for example.

But i cant animate blinking of eyes, to do this i add face control rig, (using bake animation sequence in newest UE) this cause metahuman to lose walking animation and go to T pose and i can add blinking for this pose, how to solve this?