Hi,
Currently there is no indication that the data table is sortable or how it’s sorted.
Generally, interactive elements should change the cursor to the pointer icon (like in the legend) or continue to use the default icon (the table currently uses the text icon). Additionally a tooltip could be helpful. Beyond this, sortable tables generally display a sort direction arrow in the column being sorted (up for ascending, down for descending)
Note: Keyboard cannot be used to sort the data table (would be helpful for accessibility).
Default mouse cursor (pointer icon)
Text mouse cursor (text icon)
Example of it with triangle icon
You can try it with any chart.
Thanks
Kerry