8 days ago I had created the same topic relating to LCEN ILS29 approach chart. The answer from dear Richard is below:
No airport can be banned, but its possible that some “countries” may not recognize those airports/airspaces. LCEN (ERCAN) airport is not recognized by ICAO. It does not mean that it is “banned”. It has its own political statue which doesnt mean that it is illegal to produce/publish any navdata (which is just an information). As far as I know nietherNavigraph nor Jeppesen is a government or a political institution. Anyway if your company may choose not to do this, I can understand that.
But actually there is LCEN-Ercan airport navdata in FMS data base provided by navigraph (but only VOR29 approaches).
As a pilot who fly in REAL world, I do use pretty much every month those navdata/approach charts which is provided by JEPPESEN (can be found below).
I hope those charts will be available on Navigraph as Jeppesen and we can use them like in “real” world.