These things are all over the place.
A couple months ago I posted a discrepancy between bodpod and calipers (18% vs 32%).
Did some cursory research and calipers are most (only) accurate for white men 18-60. I'm a west African woman, so I'm probably not th best candidate for that method.
I've never had a dexa scan and have no idea where to get one.
But, every technology has its faults and outliers. You look great, fuck what the machine says.