We wish full text search would look for about pages. This might be tricky because we don't want pages from every site duplicated. So we search none.
We could probably do better if a server assembled and maintained a search index for all installed plugins.
We experiment with this the long way by creating a site that has exactly that.
Tip: to add forgotten plugins start with Plugmatic, rerun the export, download, import, select the about page and then fork it into this site.