Man pages matching name curlopt_tls13_ciphers in section 3:

CURLOPT_TLS13_CIPHERS.3.en	debian 10 / libcurl4-doc
CURLOPT_TLS13_CIPHERS.3.en	debian 11 / libcurl4-doc
CURLOPT_TLS13_CIPHERS.3.en	debian 12 / libcurl4-doc