Man pages matching name gnutls_record_recv_early_data in section 3:

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