Is that not a persimmon? Hard to tell when I zoom in but it sure looks a North American persimmon.
Discussion
Don’t eat until soft or your mouth will be mad at you for about an hour or so. Lolol
But a definitive way to know it’s a native persimmon would be to just touch the tip of your tongue to some unripe flesh… it’ll be super astringent and make the area of your tongue feel really dry.