Does App Store Connect still require separate invitations?

A client invited me to join his Apple Developer program but neglected to invite me to join App Store Connect.


Is it still necessary for both invitations to be sent? I remember seeing messaging to the effect that Apple was going to merge the two. However, I don't have access to my client's company in App Store Connect, but I do have access to it in Apple Developer.


Is there some way I could do this myself, short of having the client's login credentials, which they don't want to share?


The client is not very technically adept, so I'd prefer not to have to try to walk them through another procedure.


Thanks,

Frank