Followed the instructions on setting up for google play store,
Created a closed release, with one active subscription, and added a tester
IAM, service accounts, got all three validations
(Note, when I tried to redo the steps with a different json, I couldn't get a single validation).
But from Google Play Store “
Test notification couldn't be sent
Make sure that you've entered the topic name in the correct format, Google Cloud is set up correctly and that you have the required permissions”