I have found, several years after deleting my Google accounts, that any accounts I missed, can be fixed with an email to support explaining I no longer have access to that gmail account. Sometimes I have to provide some understandable proof like an old purchase detail. The one or two accounts that didn’t have good support to help, were no real loss to create a new account for.
I moved my number to VoIP.ms and while it’s not nearly the same service wise, SMS do come to my email and I can call and receive calls via any VoIP app I want.
I have found, several years after deleting my Google accounts, that any accounts I missed, can be fixed with an email to support explaining I no longer have access to that gmail account. Sometimes I have to provide some understandable proof like an old purchase detail. The one or two accounts that didn’t have good support to help, were no real loss to create a new account for.