as per the documentation, https://docs.pinot.apache.org/basics/indexing/inverted-index

invertedIndexColumns

can be specified using this keyword but how do we specify sorted inverted index cols?

That's right https://docs.pinot.apache.org/basics/indexing/forward-index#sorted-forward-index-with-run-length-encoding

Caveat that the sorted column only works on real-time tables (which I think is what you have) and that also Pinot tries to use the sorted index as much as it can even when you don’t explicitly configure it. https://www.markhneedham.com/blog/2022/01/20/apache-pinot-sorted-indexes-realtime-tables/

Yes. Got it!!