Hi Niklas,
Not a perfect solution, but you could either change the enum to be (1,2,,3) for (low,medium,high), then sort the data source descending, and then use visibility rules in the ‘custom content’ of the column to set the text of the user.
Or could persist a int value along side the high/medium/low enum. This would require you maintain 2 values when changing the status but would give the same result.
Or, change your data source to a microflow, make 3 retrievals based on the enum set, and then use the Union list operation to create a new list based on the 3 retrievals.
Hope this somewhat helps
Tom