This was common to do in the old days of DSLR's. I would test each of my lenses and I had to calibrate them, but with Nikon it was just easy to do yourself.
But with Mirrorless, it uses a totally different focusing system so I don't see any reason why to do it. And Canon I would think would have built into the menu system a way to calibrate the lens if needed.
Are your lenses not focusing properly? If they aren't broke, don't fix it. Easiest way, is to just take a photo and zoom in 100% to your focus point, the point you focused on, and is it sharp or not? Make sure you don't zoom in past 100% because if you do, most things will start to soften because you are digitally zooming in now.
But I would never ever pay for it to be done. But I am sure people do it, perhaps the same people who when there is dust on their sensor send it in to be cleaned and pay for that as opposed to just cleaning the sensor themselves.
