IOS17 usb camera with messenger

Presumably you have updated your iPad to iPadOS 17.x. While this version of iPadOS supports connection of external USB webcams, Apps must be updated to support the connected external camera. Not all App Developers will necessarily yet support this new feature.

You would be best advised to seek assistance from Facebook Support

Hello Revrunt53,

Thanks for reaching out to Apple Support Communities. We see you have some questions about your USB camera and we'd like to help. Please reach out to Facebook for help, from here.

Regards.