China
Roborock
Started in robot vacuums and has since spread into stick vacuums and washer-dryers. Support runs through the manufacturer, and grey-market units are often refused service.
Roborock got self-washing and self-drying mop docks to market ahead of most rivals, and its mapping is a reference point for the category. The higher up the line you go, the bigger and heavier the dock gets — worth measuring for before ordering.