If you experience DNS_PROBE_FINISHED_NXDOMAIN errors with a newly activated domain, review your DNS settings in the Cloudflare dashboard.
Check your expected apex domain (example.com) and any active subdomains (www.example.com or blog.example.com). If they do not resolve correctly, you may need to add a record on the zone apex or a subdomain record in Cloudflare DNS.
If you have the correct records set up, make sure those records are also pointing to the correct origin IP address.
After making changes to your DNS records, you may need to wait a few minutes for those changes to take effect.