Not all DNS records are Pulled - Cloudflare Community
2019/05/26 ... Records created on Cloudflare generally propagate Globally in under 30 seconds. It is likely a caching issue with the DNS server you have ...
https://community.cloudflare.com/t/not-all-dns-records-are-pulled/86107Secondary DNS - Deep Dive - The Cloudflare Blog
2020/09/15 ... Secondary DNS involves the unidirectional transfer of DNS zones from the primary to the Secondary DNS server(s). One primary can have any number ...
https://blog.cloudflare.com/secondary-dns-deep-dive/No DNS records found on initial set up w - Cloudflare Community
2018/11/08 ... Log into your CF dashboard and go to the domain in question. Go to the DNS tab and you can add the records that you found there.
https://community.cloudflare.com/t/no-dns-records-found-on-initial-set-up-w-cloudflare/43354