At 8-10% body fat you should be able to see your abs. They not be cut up or clearly defined, but you should not have much visible fat.
I’ve found measuring body fat to be very frustrating. Both calipers and electronic scales give me inconsistent readings. I now rely on a combination of the mirror, scale weight, and waist measurements.
This is VERY true if you were once over weight even more so. I can be Fing ripped and veiny. Quad striations etc yet lower abd are just peeking through even with veins in my obliques.