Using IPv6 Gateway/Tunnel on a domain managed by partner

I didn’t find a topic which answered this question. Hopefully I’m not posting something that comes up frequently.

I have a domain where the DNS is managed by the hosting partner with cPanel. I added a new subdomain to the zone, only including a AAAA record. With previous domains, I’ve expected Cloudflare to tunnel traffic to the IPv6 host without issue.

Does Cloudflare support the IPv6 gateway services while the DNS is managed by a partner? If not, is there a clean way to transfer the DNS information to be managed directly by Cloudflare?

Thanks

Edit, the error that I’m experiencing is a DNS not found error.