I’m not sure if this is the correct way to report this, however I think I may have identified a bug in the Cloudflare interface (note: this is not a security-related issue).
I have been trying to transfer some .co.uk domain registrations into Cloudflare and I was struggling to get them to appear within my “Select domains to transfer” interface. Initially, the domains were not appearing in the list, however, when I navigated to the website in the “Websites” section of the Cloudflare admin, then navigated back to the Domains > Transfer screen, it then appeared within the list of domains. I had to do this for each .co.uk domain for it to appear for me.
I’m not sure if it’s actually a bug or not, but it did stump me a little bit.