In the Blokada settings there's a choice of about a dozen DNS servers, one of which is 1.1.1.1. If you use that it's just the same as the Cloudflare app running (you can't actually run both anyway as they both pretend they're a VPN and you can only run one at a time).
Yes that's a pain. Can't block ads with 1⁴.
So you're saying no need to use 1⁴ with Blokada running?