App Ads Revenue Assessment

I need an expert to assess my utility app's ad revenues. Despite a high volume of ad requests and impressions, the revenue is disappointing.

Key Requirements:
- Experience with Google AdMob and utility apps
- Proficiency in analyzing ad performance
- Ability to provide strategic recommendations
- Experience with various ad mediation platforms

Current State:
- Ad Networks: Exclusively using Google AdMob
- Ad Types: Currently running Banner ads and Interstitial ads

In a nutshell, I need a small review of the current status of the admob and suggestions on how to improve this (using mediation or other platforms)