Consider Archimedes' principle
Any object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object.
I do not understand why the center of buoyancy is the center of mass of the volume of the displaced fluid.
In principle it could be another point, for istance the center of mass of the object (not the displaced fluid) or maybe a point of the displaced fluid but not the center of mass.
Is there an simple way to understand why the center of buoyancy located in the center of mass of the displaced volume of fluid?