Before removing the motor, flip it over and check whether it has a connector or is soldered directly onto the PCBA.

Remove the screws.

Now you can remove and replace the motor.

Your robot may have a different iteration of the LDS, which needs it's driving wheel removed before you can remove the screws. In that case, please check: Roborock Q Revo: Laser Distance Sensor Replacement and skip to step 12.