From my Google Play console I linked a project. Then I created a service account. Still, when refreshing the console, it still says \"There are no service accounts associate
In my case: Even if you have created a service account, When you have already deleted the service account with the same name, It appears to have been deleted from the IAM tab of Google Cloud Platform. So it is assumed that it is not visible in the play console.
TODO: Create a service account with a different name (I gave the owner permission in step2 when creating, Like Q Locker's answer.). After creation, it was immediately exposed in the play console.