No, it has nothing to do with the CP module. The "UOM", as you call it, which you specify in the product's weight/dimensions settings, is only used for generating shipping quotes.
If you want to change the displayed weight unit "text" shown in your store, you'll have to change that in your language files. The weight unit is display-only text. The cart supports only one weight-unit, applied to all products universally: you decide which unit to use, and set the display text accordingly.
https://www.zen-cart.com/tutorials/i...hp?article=204