Hosted Zone Necessary for Google Suite to Function?

I am in the process of closing a charity. The website has already been taken down but I am trying to keep email functioning for as long as possible. The domain was renewed in January so is good for the rest of the year. Do I also need to keep a hosted zone (with associated monthly charge) working to keep emails to and from @domainname.org functioning? Emails are managed through Google Suite.

Apologies if this is a stupid question - I inherited the email setup from my predecessor and am not IT minded!