In case you wanted to know what their COPPA compliance looks like: https://cloud.google.com/security/compliance/coppa/
Consent is mandatory, i.e. there is no opt-out of data collection with G Suite accounts. No parent/guardian consent = no G Suite.
This is the template they offer to schools: https://support.google.com/a/answer/7391849
They claim not to use collected data for advertising. They mention sharing data for policing, but not limited to law enforcement, or legal policing.