Man pages matching name x509_crl_get0_by_serial in section 3ssl:

X509_CRL_get0_by_serial.3ssl.en	debian 10 / libssl-doc
X509_CRL_get0_by_serial.3ssl.en	debian 11 / libssl-doc
X509_CRL_get0_by_serial.3ssl.en	debian 12 / libssl-doc