Fix AdMob–Unity Mediation and possible add others

PLEASE DON'T BLANKET BID THIS. I WILL WASTE YOUR TIME AS MUCH AS YOU WASTE MINE IF YOU DON'T KNOW EXACTLY WHAT YOU ARE DOING.

I already earn through AdMob mobile game, but the Unity Ads partner inside AdMob mediation isn’t paying even though impressions are recorded. I need it configured for real-time bidding because Unity has dropped waterfall support, so the issue is almost certainly in the adapter, mapping, or handshake between dashboards.

Here’s what I need:
• Audit the current AdMob mediation group, Unity Ads dashboard settings, and in-app SDK integration.
• Correct whatever is preventing Unity Ads revenue from flowing into AdMob.
• Prove the fix by showing live revenue (not just impressions) in the AdMob report.
• Hand over a concise summary of changes plus a checklist so I can plug in other networks later—IronSource, AdColony, Facebook or AppLovin etc etc—once I open those accounts.

The game is already live on Google Play, so I just need a clean, revenue-generating mediation setup and clear instructions for future expansions.