My expectations are extremely high (because I know that on their original versions they work flawlessly, and anything short of that is poor for me), and re-reading my comment, the only exaggeration would be the battery life on my 9.7-inch iPad Pro. It dropped from around 14 to around 10-11. Occasionally, it is even lower than that, at 8-9. Nothing absolutely abhorrent, but significantly worse. For me, less than 10 hours with light use is absolutely pathetic. I’d never get that on iOS 9; yet occasionally, it happens on iOS 12. Another user might grab this iPad on iOS 12 and praise the battery life, saying “it is great on iOS 12”. It’s all about expectations and perspective.
You say you have iPadOS 16.2. On what device?