Sometimes the 3D airports with the taxiways will be invisible or no taxiway lights here, if still goes invisible or cannot be loaded or loading map problem, which is the good way to fix this?
Most of the time, an app restart is enough to have 2D and 3D parts of the airport to render again.
You can also clear the scenery cache during flight to fix this issue.
If the airport disappears just change your graphic settings and it will returm. It sounds weird but it works