I have no add-ons installed , also no payware nearby these airport… its plain/vanilla MSFS
I assume the screenshot from OP is only a zoomed part of what we see in my screenshots. The only thing I wonder was, that the grass was in may case is not as high as in OPs pictures ( there is more a green beton and some small areas with real grass ) and e.g. these ‘picture of the airplane on ground’ - but guess is some kind of details level, similar to details on building.
My assumption is: if the OP zoom more out, its the same small ‘green’ area affected only ( ref. point is these tower left ).