Custom domain not verified

Hi team I'm using appwrite.example.com in .env file however I try to add the custom domain dev.example.com and prod.example to project and copied the cname to cloud flare but not working.

Is it because I'm using nginx proxy manager?

TL;DR

Developers are trying to verify a custom domain but are facing issues with DNS challenges failing and Cloudflare not recognizing the custom domain. They suspect the problem might be because of Cloudflare and NPM being in front. The developer is also querying if using nginx proxy manager could be the cause.

in NPM i'm fowarding the dev.example request to appwrite container