Hi,
I believe I can help you with your issue.
I have 8 years of experience with Unity and released games on Steam, Android, iOS, WebGL
I am femeliar with adding ads in game as I used multiple ad providers for multiple projects including UnityAds, Admob, CrazyGameAds, GameDistributionAds, and many more.
Please send me more details about your project and issue in chat and if you are getting any error messages