Well, sorting by date is not incorporated to be honest – only by relevance or title, it never came up until now. You can change that on the Layout options -> Sorting options panel.
To display more items than the default, just change the Max items count option on the General Options panel: https://i.imgur.com/f0d1FUv.png
However I don't really recommend displaying too many items, it may not result in a good performance – mostly on the client side, the plugin was not exactly built for that.Best,
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