The camera does not normally report this (there is no menu, etc. to check it... nor is the shot number embedded in a photograph meta-data, etc.)
”officially” if you send a camera in for service or tune-up, you can request that they also report the shutter count, and Canon will give you that info.
But there are a handful of 3rd party utilities that fetch the shutter count from the camera.
If you have a Mac, there’s a utility by Dire Studio called “Shutter Count” ... and it’s not very expensive (a few dollars). They used to make a windows edition, but stopped (not sure why).