I think rest assured your backups will be encrypted-by-password.
Though, I often find myself wondering if this represents going in circles with security. If the security surface of all of your 2FA keys now reduce to one measly password, well, wait a second, does protecting everything with two passwords count as 2FA?
"encrypted by password" doesn't mean much by itself: is the whole security chain open source ? audited by a third party ? as well as any changes ? Secured by the provider accepting responsibility for breaches and their consequences ? ...
Employees down to subcontractor's trainees can modify the code or pwd store... FYI, the industry standard for "risk of corruption" is: 3 months of wages. In low-pay countries, this means, literally, pocket change. How sure are you that whatever Google does is impervious to such insider bad actors, even if at a specific time their setup was indeed secure ?
Though, I often find myself wondering if this represents going in circles with security. If the security surface of all of your 2FA keys now reduce to one measly password, well, wait a second, does protecting everything with two passwords count as 2FA?