I'm not talking about the part that plugs into the wall, but the other end, they should make all electrical equipment with the standard PC power supply input (IEC-C13) this way all you need is the correct power cord for your location.
Unfortunately that was far less than clear from your post in question - the C13 is one of the small variety of appliance couplers and matching appliance inlets in IEC standard 30620, which IS a widely accepted and used Worldwide safety standard for such components.
They are used in a huge variety of household equipment, both appliances and electronic equipment, but it is up to the manufacturers to decide whether they are both suitable and economic (and it costs a lot more to fit them than some comparatively cheap cord bush & grip components) to use in any specific product, and a so very large proportion of those don't utilise 60320 inlets & plugs.
Also, price-conscious domestic appliances are often made in very large quantities for specific national markets - which often have their own national mains plugs fitted to the power cords/leads - and that means that it is far more economic for the manufacturers to fit those products with permanently-attached cords &, thus, plugs. OTOH, on lower volume products, notably electronic ones, designed for multiple markets, then detachable cordsets with a variety of national plugs are far more common (people should check their own appliance and electronic equipment to confirm how true that is).