I have a banner and rewarded ad in my game. The banner displays in the Editor, iOS and Android. The Rewarded Ad is displayed in the Editor and iOS but not on my Android Device.
Output of adb logcat -v time UnityAds:V *:S
11-19 21:08:49.828 I/UnityAds( 9015): com.unity3d.services.UnityServices.initialize() (line:66) :: Initializing Unity Services 3.3.0 (3300) with game id 3365434 in test mode
11-19 21:08:49.843 I/UnityAds( 9015): com.unity3d.services.UnityServices.initialize() (line:80) :: Unity Services environment check OK
11-19 21:08:51.887 I/UnityAds( 9015): com.unity3d.services.core.configuration.InitializeThread$InitializeStateConfig.execute() (line:192) :: Unity Ads init: load configuration from https://config.unityads.unity3d.com/webview/3.3.0/release/config.json
11-19 21:08:52.109 I/UnityAds( 9015): com.unity3d.services.core.configuration.InitializeThread$InitializeStateLoadCache.execute() (line:245) :: Unity Ads init: webapp loaded from local cache
11-19 21:08:53.649 I/UnityAds( 9015): com.unity3d.services.core.api.Sdk.logInfo() (line:82) :: Requesting configuration from https://publisher-config.unityads.unity3d.com/games/3365434/configuration?bundleId=com.appviper.sweetlicious&encrypted=true&rooted=false&platform=android&sdkVersion=3300&osVersion=9&deviceModel=moto%20x4&language=en_US&test=true&analyticsUserId=121abd1d7286696848dc7562a8c0aeec&analyticsSessionId=5288015158916491131&deviceMake=motorola&advertisingTrackingId=b05a4b80-3426-4e83-bde5-125693828375&limitAdTracking=false&frameworkName=Unity&frameworkVersion=2019.2.12f1&adapterName=Packman&adapterVersion=3.3.0
11-19 21:08:54.145 I/UnityAds( 9015): com.unity3d.services.core.api.Sdk.logInfo() (line:82) :: Received configuration for token eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWMiOjYyLCJjcGkiOjE1LCJjcmVhdGVkIjoxNTUyMzE4NzgzMDAwLCJleHAiOjE1NzU0MjUzMzIsImlhcCI6MTg4LCJpYXQiOjE1NzQyMTU3MzIsImlzcyI6ImFkcy1nYW1lLWNvbmZpZ3VyYXRpb24udW5pdHlhZHMudW5pdHkzZC5jb20iLCJsdHYiOjg3LCJwcm8iOjIzOCwic3ViIjoiVlA5Ykl4U2NHSEhqOHVxczEvOGpRZ3ZHbzB1Y0tEYkNhM2lraSt5TVlxbCt6ZnVoU0E0SnNRa3dvc2RlNmlkczVoclZYQT09IiwieHByIjoxNDR9.Y-M0B_IOLDshjvFH1j7ZQAJfFVyDEV4nL7R7bQEuxhI (A/B group 17)
11-19 21:08:54.225 I/UnityAds( 9015): com.unity3d.services.core.api.Sdk.logInfo() (line:82) :: TestMode delegate is set
11-19 21:08:54.337 I/UnityAds( 9015): com.unity3d.services.core.api.Sdk.logInfo() (line:82) :: Requesting ad plan from https://auction.unityads.unity3d.com/v4/test/games/3365434/requests?advertisingTrackingId=b05a4b80-3426-4e83-bde5-125693828375&limitAdTracking=false&deviceModel=moto%20x4&platform=android&sdkVersion=3300&stores=google&deviceMake=motorola&screenSize=268435794&screenDensity=480&apiLevel=28&test=true&screenWidth=1080&screenHeight=1776&connectionType=wifi&networkType=0
11-19 21:08:59.725 I/UnityAds( 9015): com.unity3d.services.core.api.Sdk.logInfo() (line:82) :: AdPlan received with 1 campaigns and refreshDelay 0