I would like to hire a pro freelancer who's able to block adsense in some counries.
To block loading Adsense Ad in some country, you may follow below steps.
Step 1. Very first, enable CloudFlare GEO Location
Step 2. Remove adsbygoogle.js from all Ad units and wrap Adsense code with div class 'firewall'.
Step 3. Place PHP code in appropriate location. So, script can load for unblocked countries and CSS can load for blocked country.