You certainly can sort waypoints by name in the data view. Click on the "Modified Date" or "Created Date" column headings.
I don't know of any official Garmin format but I regularly parse the files exported by BaseCamp (csv and gpx) in order to produce reports of my own, so I know the format pretty well.
If all you want is to have a simple list of waypoint names sorted by date, one way to do it would be to import the file into excel, delete the sections not dealing with waypoints, and let excel split the data into columns. Then delete the columns you don't want and finally sort the rows.
If you need more than that I'd be happy to help by private message.