Hi…,
The 10-9 Chart for WATG is not georeferenced, so it can’t display Moving Map. Normally, the airport diagram chart 10-9 is georeferenced. We shall check why this is not the case.
As you note, you can use the enroute map and zoom in to the airport (as recommended here https://forum.navigraph.com/t/airfield-charts-to-assist-with-taxi-routes/11768/3), where the very detailed AMDB map can be used with moving maps. It shows all taxiways and parking positions.
Cheers
Ian