Man pages matching name html::treebuilder::libxml in section 3pm:

HTML::TreeBuilder::LibXML.3pm.en	debian 10 / libhtml-treebuilder-libxml-perl
HTML::TreeBuilder::LibXML.3pm.en	debian 11 / libhtml-treebuilder-libxml-perl
HTML::TreeBuilder::LibXML.3pm.en	debian 12 / libhtml-treebuilder-libxml-perl