Set up a new Android Enterprise domain in Intune/EMM when an old-style Google Account is still connected

Hi, I have a situation similar to this older discussion - situation as follows:

• My EMM is MS Intune.
• Managed Goole Play Store was set up in April 2024 before the new method of creating Android Enterprise admin accounts on a managed Google domain - using a normal Gmail account
• This Gmail/Google account was forcibly deleted in the last month, presumably for inactivity, as the first linked discussion describes.
• Only the final termination email was ever sent to the recovery email, no other warnings were received.
• Recovery was not possible (it just said that no recovery methods were set up, even though there was a recovery email - hence the warnings...!) and now the account shows as nonexistent rather than potentially recoverable, although it's less than the quoted 30 days that recovery is available.
• I have seen (Community Manager) Lizzie's helpful posts and advice from a couple of years ago, including this article describing the potential for having support migrate the EMM bind from one account to another.
• However, I don't yet have another account to migrate to, since I would be moving from an old  Gmail account to a new managed domain account - which I don't yet have, as I can't sign up as a 'new customer' to Android Enterprise within Intune, because the old bind still exists, and I haven't found anything to tell me how to sign up other than going through the EMM.
• I want to keep the old bind active so it doesn't break existing devices, even though I think that's what's stopping me signing up to Android Enterprise in the new way. Removing this existing orphaned bind will break everything, and Lizzie's info in other posts has suggested that the bind will stay mostly-working if left alone, whereas removing it will trigger retirement of all devices.
• MS/Intune support don't seem to be aware of the possibility of contacting Google support to migrate a bind, but even if they were, I don't yet know what to tell them (as I have no new destination account, of course). They just advise me that it will need a new account and re-enrolment of all devices, which I'm hoping to avoid.

I know this is convoluted, but that's why I was hoping for help. Is there a way to get a new Android Enterprise admin account set up, using the new managed domain method, without breaking the existing bind - and then to migrate the bind across?

Thanks

Dev