Fatty liver doesn’t equal diabetes…you could have one but not the other (though I think everyone who is overweight is prone to fatty liver). Great that the ultrasound doesn’t show it!!
There’s lots of people that are thin and have diabetes (my grandfather’s one - he’s T2D).
The high carb SAD is to blame for most peoples’ diabetes (amongst a plethora of other diseases).
Have you had bloodwork previously that has shown that you’re T2D or pre-diabetic? The important thing is to look at the trending. A few months on a ketogenic diet should have an impact. (most Dr’s - trying to get bloodwork more often than once every 3 months may be like pulling teeth)