Set up and it appears to be working - no complaints registering that binding.
However
nslookup my-project.my-domain.com
nslookup my-project.my-domain.com
is failing, falling back to my ISP's default page.
Do I need to set up a subdomain in DNS? And if so to what address do I point it? It feels like I shouldn't have to do any of this since the domain is managed by cloudflare DNS, but I might be missing something.