Custom domain in "Inactive (requires DNS setup)" state despite passage of days

My page project has 3 custom domains attached to it. Unfortunately, Cloudflare shows one of them as “Inactive (requires DNS setup)” even though it has been days since I did that. I checked locally on my machine and I was able to see the DNS resolving to the right CNAME record that Cloudflare expects. Is this something at Cloudflare’s end?

What’s the domain?
Can you run through the debugging guide: Debugging Pages · Cloudflare Pages docs

I got a strange response. I don’t know how to interpret this:

curl: (35) OpenSSL/1.1.1t: error:14094410:SSL routines:ssl3_read_bytes:sslv3 alert handshake failure

My DNS is not managed through Cloudflare. I added it as a Custom Domain on the Pages project which asked me to set up a CNAME at my DNS provider. This wasn’t the first custom domain I was setting up on the page; it was the third. The other two seem to be working fine but this one despite being setup at a similar time seems to have gotten stuck in this state. Running a nslookup returns the CNAME that Cloudflare asked me to put.