Man pages matching name gnutls_ecc_curve_get_pk in section 3:

gnutls_ecc_curve_get_pk.3.en	debian 10 / gnutls-doc
gnutls_ecc_curve_get_pk.3.en	debian 11 / gnutls-doc
gnutls_ecc_curve_get_pk.3.en	debian 12 / gnutls-doc