If you mean video noise reduction, there is only one build-in option - VR Denoise. I don't like it and don't use it, but better than nothing, I guess. If you are Ok with 3rd party standalone tools, I can recommend this: https://www.youtube.com/watch?v=2NilYO-9YvM
I don't recall Premiere having a built-in video denoiser, but that doesn't mean it didn't.
The main pro-use tool for video noise is of course Neat, which is typically used by pro colorists even though Resolve has a pretty decent noise-reduction OFX tool. I've got Neat, use it both in Pr and Resolve.
This article/tutorial is from 2021, so they had it until recently. I gotta say, I am really not liking the direction Adobe is taking their software. It seems like they are pushing people to other places.