Wyze scale body fat measurements

I have been testing the Wyze-scale. I have another scale from Withings as well.
The body weight in both systems match very closely. The body fat measurement is quite a bit off. For example, Withings indicate range between 16 to 17 while Wyze indicates between 8 to 10. I tend to belive the Withings number because I have had fast measurements taken by the doctor and it is close to the Withings measurement.
Why such a discrepancy.

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I don’t have had a lot of experience in this, but I checked my BMI from Wyze and from my latest physical and it was off by only .2