Google will do nothing. I’ve tried for over a decade to get a fake city removed from Google Maps. I’m making the name up but imagine you have a neighborhood near you called Northfield. When google maps started someone from the neighborhood thought it would be great to make up city with the same name.
No amount of complaining will remove it. It only exists on Google maps, not on Apple Maps, Waze, Openstreet, or the various garmin/navitronics outdoor/boating navigation apps I have.
My understanding is these are called Paper Towns. Map makers add them as a way to identify when their copyright is being violated by others coping the maps wholesale.
May I suggest to create a "mine field, you will die" banner in your property with stones big enough to be picked by the satellite photo in the next update?
Or you may prefer a tasteful "sea crocodile sanctuary" traffic signal (Extra points if you draw the crocodile eating a tourist holding a beer and wearing Tyrolean pants).