At the following link:https://www.supertechcrew.com/thunderbird-oauth2-gmail/... they claim that getting Google to accept Thunderbird's OAuth is a fairly simple trick. I don't have Thunderbird, so unfortunately I can't test it.
This message mentions getting an early access pass through the My Wi-Fi app. I've installed the app and looked around, but I'm not finding any mention of email migration. What are the steps to actually get the early access pass?