Modern dishwashers, especially in Europe, are using heat pumps as well. They don’t really benefit from the extra voltage and watts anymore.
Sure, but most people don’t have a modern dishwasher. It’s an appliance that lasts 20 to 30 years ergo most people have old dishwashers that were manufactured decades ago.
I think you’re confused, heat pump dishwashers are extremely rare even in Europe, and basically unavailable in the U.S.