Unable to receive macOS updates on my MacBook Air

You are fully updated. The next OS version was Ventura and only supported on these computers:

macOS Ventura is compatible with these computers - Apple Support

Depends on what Mac you have if there is an update available. Go to  > System Settings > General > Software Update, and it will tell you.

What Mac model / year do you have?

What macOS version is it running?

Do you know if there're any updates available for your Mac specifically?

You are welcome.