Hi @scottcp,
I have inspected the users on your tenant and found that your Google Connection user has nothing saved to their app_metadata while other users have items saved in their app_metadata.
That is why you have not been able to get the app_metadata in your access token, even though you have a Rule that appends the app_metadata to your access token as a custom claim.
With that, I recommend checking the Google Connection user profile and making sure it has data saved to the app_metadata.
Thanks,
Rueben