Man pages matching name ssl_ctx_use_psk_identity_hint in section 3ssl:

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