No, if they lookup your domain name, it will point to Cloudflare, hence it's proxy service IP will show.
But if someone scans the whole IP range, then yes, your server will probably acknowledge.
That is the curse of a Public IP.
You can secure what ports a scan might find open.
But as @overseer mentioned, sound like you might be doing something darkweb'ish not wanting your IP to show at all, which again, is impossible.