Firebase Console is the go-to place for most of the activities that developers perform. For Test Lab, Firebase Console has a dedicated console menu, inside which developers can choose to have a Robo test or instrumentation test.
First and foremost, create a Firebase project in the Firebase Console. You also need to be the owner of the application or you need to have edit permissions in your project.
Drop your APK. By default, your app is tested with a Pixel device through a Robo test.
Give it some time and the Robo test will be completed with the device screenshot ...