It is good to know that SAB now offers Firebase InApp Messaging.
There is a device test option available when creating any campaign in InApp messaging.
It requires the FirebaseInstallationID for that. As instructed in the tutorial, that can be obtained from Android Studio Log.
Please add the FirebaseInstallaionID box to the SAB’s Firebase InApp messaging section and enter the necessary ID of the connected device—the device on which the app is operating—in that box.
Thanks