How do we get our logo and name to display on Google login rather than Auth0?

From our side since we can’t change Google decision on this we are working on making this a non-issue by considering supporting the alternative that you mentioned (the ability to use your own domain to refer to the Auth0 service). However, there’s no concrete information about how/when would that be available. For now besides the possible convoluted hack with custom OAuth2 connections mentioned in another comment I don’t think there is any workaround.