Man pages matching name www::form::urlencoded in section 3pm:

WWW::Form::UrlEncoded.3pm.en	debian 10 / libwww-form-urlencoded-perl
WWW::Form::UrlEncoded.3pm.en	debian 11 / libwww-form-urlencoded-perl
WWW::Form::UrlEncoded.3pm.en	debian 12 / libwww-form-urlencoded-perl