Inductors in DC motor drivers
Your linked device can be used with a wide variety of DC voltages for various motors. There's on-board quite complex communication and motor speed controlling circuitry which needs its own stable operating voltage. To get that operating voltage properly from all possible motor supplying voltages a flexible switching power supply is needed. That power supply surely has inductors. Motor gets PWM signal, there's no inductors for motor current except possible radio interference limiting chokes.