Is there any way to get the mouth to open more during the LipSync?

When I do the lip synch for my characters, I noticed the mouth doesn*t open very far. And it almost looks like they are mumbling.

I know I can puppet the jaw and try to open it wider on certain words. But have found the results with that to be uneven and a bit wooden.

Any tips on making the mouth movement more pronounced when you import audio and CrazyTalk does the automatic lip sync?