Can I use that on my iPad Pro gen 2?

Unfortunately, Center Stage is not available for your iPad Pro 2nd Generation. Below is an excerpt from an article published by Apple:

Use Center Stage on your iPad Pro

Center Stage uses machine learning to adjust the front-facing Ultra Wide camera during FaceTime video calls on your iPad Pro 12.9-inch (5th generation) or iPad Pro 11-inch (3rd generation) to help keep you and anyone else with you in the frame.

Axel F.

Not on that old an iPad Pro.

These older 2015-2017 and the 2019 and 2020 iPad Air 3 and 4 lack the needed camera hardware for CenterStage.

Sorry.