$ uname -a
Darwin MacBook 27.2.0 Darwin Kernel Version 27.2.0: Wed Oct 14 23:47:21 PDT 2026; root:xnu-13432.41.4~25/RELEASE_ARM64_T6030 arm64 arm Darwin
$ which curl
/usr/bin/curl
$ curl https://dv-g3b-emudhra.we-have-a-problem.com/
Your client successfully connected to the site. That's bad!
No, no, I meant it to show that the machine is running the current/latest macOS, and the results I am getting from curl on the two URLs.
Maybe you have another curl in your path?
Aha! Touche! Indeed, I am using brew's curl ("/opt/homebrew/opt/curl/bin/curl"). That's why; the one at "/usr/bin" connects just fine (facepalm).