Is it not a fake?
Can’t we get clearer photos of this area from one (or more) of the satellites orbiting the moon? Surely we could zoom in on this area and get a higher resolution image, or possibly images taken at different times so that the shadows fall in different directions so that we can get a better understanding of what is actually there. We need some rovers on the moon to bring up close up images of these features. Imagine a rover parked in front of that thing and taking a photo of what it looks like from ground level. We might well be staring into the front door of a base.