How to convert VRoid models to work on this app?

Hello,
first of all, great app! very helpfull for people whos leaning this kind of stuff! congratz!
maybe I missed some docs but, how did you manage to convert the VRoid model to work on this app?

What I've tried:
1 - create a model on VRoid Studio
2 - export to vrm
3 - change the file extention from .vrm to .glb

results: it loads into the application but the models mouth don't move...