I have yet to see the sensor in my R5m2, and I am hopeful that I never shall.
Sensor cleaning and closing the shutter curtain are programmed for whenever the camera is turned off.
If I never see the camera’s sensor, because it is hidden when I change lenses, then neither will dust! Yes, I realise that my ‘logic’ isn’t 100% foolproof, but it is very close!
… David