Hi Noel
The Mediation app works by letting your own ad network accounts compete on Ezoic traffic against Google's Ad Exchange and Ezoic's other ad partners for the ad inventory on your site. Whoever is willing to pay the most wins the impression, ensuring that you're paid the highest amount possible.
On the Ezoic dashboard, you'll see the 'Mediation Ad Partner' earnings reported. Money collected through Mediation will be paid by Google to your own account and be reported in Ezoic as 'mediation earnings'. Any other earnings on your traffic going to your original site are handled separately from Ezoic.
If you have your Adsense setup in the Mediation app and you are not seeing any mediation ad partner earnings then this can be due to 2 things.
1- Your Adsense is not winning against Ezoic.
2- You do not have your original Adsense ads wrapped in Ezoic code on your site for Ezoic to compete. Adsense ads must be on the site and wrapped in Ezoic code for Mediation to compete. Here is a guide on how to wrap your ads.