From Pega 7.3, it has new type of Layout specific for List/Row based i.e "Table" extending feature of reordering, resizing etc of "Grid Repeating Layout". Thus, leveraging capability to process data presentation at UI level.
While, as mentioned Table is getting converted in to Repeat Dynamic Layouts and it doesn't have these Presentation configurations.
Alternatively, you can process data(sorting) while fetching the data For ex:- when the source is report definition rule.
Conclusion:- As per my knowledge, you can't do it with Repeating Dynamic Layout as the section is embedded content rather a row.