easy:SetOpt_TLS13_Ciphers(list)
You will find more details about cipher lists on this URL: https://curl.se/docs/ssl-ciphers.html
This option is currently used only when curl is built to use OpenSSL 1.1.1 or
later or Schannel. If you are using a different SSL backend you can try
setting TLS 1.3 cipher suites by using the #CURLOPT_SSL_CIPHER_LIST
option.