If the gmail address linked as the recovery address for the first gsuite admin on a domain is suspended for a T&C violation, then the whole gsuite domain will be suspended too automatically.
Its a good reason to never link a gmail address as a recovery address for gsuite - always use another free mail provider.
T&C violations disable an account and any linked recovery addresses (and accounts with the same recovery phone number).
If an account is disabled, all resources associated are disabled and deleted 30 days later.
A GSuite domain is considered a resource 'owned' by the first admin, so if that account is disabled, so are all in the domain. If it is deleted, so is the domain.