[[Ditto? &parents=`21` &tpl=`news_archive` &orderBy=`createdon DESC`]]
[[Ditto? &parents=`21` &tpl=`news_archive` &orderBy=`publishedon DESC`]]
This question has been answered by frogabog. See the first response.
<div class="post">
<p>[[+publishedon]]</br>
<a href="[[~[[+id]]]]">[[+title]]</a></br>
[[+introtext]]</p>
</div>
[[!getResources?
&parents=`[[*id]]`
&tpl=`yourOutputChunk`
&sortby=`{"publishedon":"ASC"}`
&showUnpublished=`1`
&showHidden=`1`
&includeTVs=`1`
&processTVs=`1`
]]<div class="post"> <p>[[+publishedon]]</br> <a href="[[~[[+id]]]]">[[+title]]</a></br> [[+introtext]]</p> </div>
&sortby=`{"publishedon":"ASC"}`