The water inlet valve in your Ikea dishwasher is a small electrical solenoid valve that opens to allow water to flow into your Ikea dishwasher when electrical current is supplied to it. Some can be more involved than this but, the basic principal is to allow water in as required.
Ordinarily these valves are easily tested for electrical failure using multimeter, simply check for them being either open or closed circuit and, if open circuit, then the water valve is faulty.
We are shipping orders as quickly as possible all the spare parts that we can during this difficult period. Orders where possible will ship as normal but delivery times may vary due to the pandemic and freight issues etc, please allow extra time for delivery.