need Flutter Mobiles app Lip syncing app

Hello,
i have front end ready all you have to do is creating api for lip sync.
you can take reference below app..

https://play.google.com/store/apps/details?id=com.womboai.wombo&hl=en_US&gl=US
https://www.wombo.ai/

below are two files attached one is our gui name ending with ****33 PM.mp4
And second one is wombo video name realApp.mp4 having reference app .

PLEASE RESPOND AFTER VIEWING BOTH VIDEO.....