Please see details below
Which TLS version are you using at your client? 1.2
I see you use Postman, which has got Settings option to configre Protocols which are disabled during handshake and cipher suite selection - maybe you are using too old or unsupported one?
What ciphers do you get as a result when using GET? For this zone I see none, but for our home zone we see our needed cipher these need to be applied to another zone we have.
Moreover, which TLS minimum version is selected at Cloudflare dashboard for your domain? 1.2
Can reply with the “copy-pasted” values which you have entered to your request?
There could be a mismatch between unsupported TLS version and ciphers of a client and of an SSL connection to Cloudflare. We have out own set of approved ciphers the. We have an internal scanner and the CHA CHA cipher is not approved. We have tour standard default set on our home zone and see the cipher
When making a get request on that zone.
Maybe for that kind of option you would need Advanced Certificate Manager? I was told this was not needed for updating cipher suites
Or is there a bug at the moment regarding it? N/A
There is also the documentation for the list of accepted cipher suites here: We have to have custom ciphers