Oculus Lip Sync

Hi everybody!

I have various models of 3D captures of people, my goal is to animate the lips as they speak. I'm trying to use the Oculus LipSync tool for Unity. (https://developer.oculus.com/documentation/unity/audio-ovrlipsync-unity/) to do this, however it doesn't seem to work with my models and I can't figure out why. Is it possible to use this tool for 3D models as scans? (For example, similar models can be found here https://renderpeople.com/free-3d-people/, but the plugin still doesn't work on them), and what features a 3D model must to have? From the guide I understand that I only have to mount the various scripts on my model and it should works, I'm doing something wrong?