can i use zoom on a 2021 MacBook pro

I see no reason why you can't. This Zoom support article says macOS 10.14 or higher:

https://support.zoom.us/hc/en-us/articles/360016688031

A new MBP should ship with macOS 11.X "Big Sur," which is higher.

GLS_jr wrote:

I just purchased it. worked fine on my old MacBook, but now telling me the app needs to be updated.

What app needs to be updated? Update the app.

Sure. Lots of folks do.

Are you having a problem?

There may be a newer version required for Big Sur, which does a LOT of re-arranging from previous versions.