The vast majority of such lists are used solely to either reject email transmissions, or used in spam filters to add (or remove) a score, which will count towards the final score, that decides whether or not to put your email in e.g. the Inbox or Junk folder.
Since the IP addresses of the Cloudflare HTTP Proxies aren’t used for emails traffic at all, and as such, for none of your email traffic either, you should simply ignore it.