Your geo-traffic sources appear to be highly concentrated and you are missing out on traffic from high-EPMV countries like the U.S. You may want to consider updating your content strategy to include some English-language articles as well while still keeping the focus on the same topics you already write about.
If your site is approved for AdSense, you can also set up AdSense Mediation.
https://support.ezoic.com/kb/article/google-adsense-and-the-mediation-app
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