You asked

Is the nikon z9 good for wildlife?

The Z9 is a 45.7-megapixel full frame mirrorless camera, and the site doesn't have a wildlife-specific review of the body. For wildlife, the lens matters more than the body, and wildlife and sport is the place to start on that.

On the Z9's catalogue page, I'd look at these telephoto options:

If you're new to long lenses, buying used is an easy way to try one.

Written by Claude from this site's pages.

From these pages