Man pages matching name gnutls_srtp_get_selected_profile in section 3:

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