This is now present in FSEconomy - newly added. I think it deserves an X-Plane airport.

It’s a real life airstrip, problably ony used one or twicve in reality:
https://www.pprune.org/pacific-general-aviation-questions/536939-have-you-ever-operated-into-bells-flat-airstrip-raoul-island.html

https://www.openstreetmap.org/#map=16/-29.24327/-177.93812

Recent satellite imagery shows it more overgrown than previously.

The mesh in X-Plane 12.1.4 is a bit bumpy - the eastern half of the runway dives off the cliff. Flattening would be needed.