How to insert a mask like this into the effect house

If you just want it to act like a plastic mask, then you should be able to drop it into effect house and use it with head tracking to attach it to the face.

If you want the mask to follow the user’s facial movements, I think you’ll need to re-model it, using the official EH face mesh. This way, all of the vertices correlate correctly to the face tracker.

https://sf16-va.tiktokcdn.com/obj/eden-va2/bzeh7uhtyvu/3d-face-shape/FaceAssets.zip