That's your requirement, but it might not be Wikipedia's requirement. Ownership of IPs is really a technical detail invisible to most people; ownership of eyeballs by way of the domain name and top Google result is probably more important. Cloudflare doesn't impact that ownership other than being able to temporarily take you offline if they choose to terminate your site.

Still, large proxy-based CDNs do have the ability to completely bypass all the same-origin protections in the browser. Even if they are angels and don't abuse this trust for identity theft and surveillance, it makes them a juicy target for bad actors, state sponsored and otherwise.