Make sure your hot water tank is set to 140F (60C) by reading the dial on the tank and/or using a thermometer to test the water itself.

You can run the tap until it’s hot as it gets then fill a glass and drop the thermometer in.

You could set your tank lower (120F / 49C) if your dishwasher has heating cycles ( a.k.a “sanitize”, “hi-temp wash”or “power boost”).

However, it likely does not heat the water as efficiently (cheaply) as your hot water tank.

The dishwasher will run the motor/pump splashing the water around until the water is up to temperature, then begin a countdown for wash time to run 20-60 minutes more.