Not blocking ads for apps within Prime

I seem to have everything set up correctly, but the extend site says I’m using cloudflare on my phone. I don’t see where. The dns is correct on our wifi router, and my phone is set to use nextdns but the nextdns site says I’m using cloudflare. 
i have adguard in my phone but I’ve tried this with it on and  off and I still see ads on my iPhone and AppleTV (that’s the important one).