Where is the camera app on Apple Watch 3?

If you press in on the crown to the GRID view you will find it. If you display your icons as a LISTING, scroll to Camera. This might interest you....https://support.apple.com/guide/watch/camera-apda6e61c287/watchos

The apple watch doesn't have a camera app,it's a remote control for the camera app on the phone.

Yes I know. I have used it before with this watch and phone. It is not there at all like it was. What do I do to get it back??????

Yes I have used it before with this watch and phone. It was there and now not. How do I get it back?????

You might have to reinstall it,go to the app store on the watch and search for "remote" it might be a down the list a bit.