I recently submitted a Google Play Games Services project for an Android game in order to add leaderboard/achievements capability in the game and my submission for OAuth Consent Screen was rejected for the following issue
My app was using the same icon which was uploaded for the Android game in the developer console. I uploaded the same icon a few times thinking that probbaly it’s the issue with icon format and kept getting rejected wih the same message. Finally I asked what do they mean by home page and in reply I received the ico file form my authorized domain website which did not match with the icon uploaded in the OAuth screen. I uploded the same icon image in the OAuth screen which was used in my authorized domain website (also hosting privacy policy) and finally OAuth consent screen was approved by Google.