Would it be possible to have an option to show the character weight in kg, instead of lbs (Or have both shown at the same time, whatever is more convenient for you). Rounding it to make it look better in the UI, would ofc be fine. Like the starting weight of 125lbs (which as a Danish person tells me absolutely nothing, without looking up conversions), would be 56.70kg, so showing it as 57kg would be fine then.
It does ruin the immersion a bit, to have to constantly do mental math/check unit converters to be able to really tell what their weight is