iCloud custom domain verification

I’m trying to add a custom domain managed with Cloudflare to iCloud. iCloud in turn redirects me to a Domain Connect URL on the Cloudflare site which gives me a 404:

https://dash.cloudflare.com/domainconnect/v2/domainTemplates/providers/icloud.com/services/custom_email_domain/

Does Cloudflare actually implement domainconnect? The definition for this provider seems to be in their Github repo at least: Templates/icloud.com.custom_email_domain.json at master · Domain-Connect/Templates · GitHub

A post was merged into an existing topic: 404 error when trying to add domain to icloud