Online export of waypoint names / types is discussed here,
so obviously it’s not implemented yet. 
Waypoint names currently are supported in app’s offline GPX export.
There are turn instructions on waypoints too, so their names should be unmodified.
Or else at each import / export there will be added new prefixes (WPx WPx WPx…).
It is each app’s responsibility to add custom prefixes in its panels (if they’re needed).