this is at the top of the documentation for using external testers.
“This feature is temporarily unavailable. Currently we are not approving publishable URL requests. We will change this note to indicate when we are approving publishable URLs again.”
any update on when this will be fixed? its incredibly frustrating to have testing basically shutdown. yes we can use internal accounts but the app is meant for people outside the organization. it would be irresponsible to not test it as external users.