Man pages matching name mkdoc::xml::encode in section 3pm:

MKDoc::XML::Encode.3pm.en	debian 10 / libmkdoc-xml-perl
MKDoc::XML::Encode.3pm.en	debian 11 / libmkdoc-xml-perl
MKDoc::XML::Encode.3pm.en	debian 12 / libmkdoc-xml-perl