And further down this Rabbit Hole …
FP generated in World map with User waypoints, then entering FLY, it is correctly depicted in MSFS with it’s User Waypoints, and is visible on the VFR Map, and the GNS530 & GNS750.
But if “Navigraph Charts” are then loaded, and told to load the current Flight Plan as detected in the sim, there are no signs of the User Defined Waypoints on the Navigraph Chart display, so Navigraph did not seem to recognize those User waypoints and thus does NOT correctlyt display the FP that is currently loaded in the sim.
Literally “The Plot Thickens” !!