Man pages matching name net::facebook::oauth2 in section 3pm:

Net::Facebook::Oauth2.3pm.en	debian 10 / libnet-facebook-oauth2-perl
Net::Facebook::Oauth2.3pm.en	debian 11 / libnet-facebook-oauth2-perl
Net::Facebook::Oauth2.3pm.en	debian 12 / libnet-facebook-oauth2-perl