Seeing an issue with SharePoint permissions when a user is added to an Office 365 Group in a different GEO tenant. Here's the full case we're running into:
Microsoft Teams site created in main tenant (US) which has an associated Office 365 Group. If a user from one of our GEO tenants (in this case Canada) is added to the group they can access the Team and are in the Office 365 Group permissions but, they are not added to the SharePoint permissions. We are having to locally add these users to see Files/SharePoint site.