[ggm]

> 2FA is risky for me as I travel internationally a lot and non-working number can be a real hassle

This is "2FA by SMS message" -Most people use TOTP which is an authenticator using time based cyclic number generation from a seed.

The 2nd factor doesn't have to be solely in a phone: Bitwarden &c can handle the TOTP. I know this weakens the value, but it does exist as an option.

Good ole email doesn't make the most sense. Its highest risk. You're basically living in the exposure to the risk right now, howling at the moon. So, against theoretical vs actual risk, your actual risk right now, is the lack of proofs of ownership to recover access to emails. (it's not your primary problem. Thats being locked out)