a) Your domain is registered
b) The registry does list it and does return Cloudflare nameservers in the Whois, however
c) It does not return nameservers on a DNS level
I’d first contact my registrar to enquire as to why they dont seem to return any nameservers and clarify whether there might be some issue. Once everything is clear there and there is still the 1049 error I’d contact Cloudflare’s support.