Freewheels for EVBike - available from specialized companies

FAQ: I just bought 36v500w 26“ rear EVBike set. I tried to install Shimano freewheel on it, but it has a lock. In my bike repair shop, they told me that I need spacer for the freewheel. What dimension should be for 7 speed Shimano freewheel?

Answer: There are different combinations of the free-wheels,  we suggest to consult the professional bike components companies who have a wide range of accessories including the spacers.  Some companies offer freewheels designed for E-Bikes (EVBike) directly. See example of such promotion leaflet from a supplier called Sunrace.