There is an EXIF tag ShutterCount but I'm not sure if every model uses it. My Canon R6 II writes the shutter count info into the ShutterCount EXIF tag.
You can read it with online tools like
https://shuttercount.net or the
ExifTool
More information about the EXIF tags Canon uses can be found here:
https://exiftool.sourceforge.net/TagNames/Canon.html
You can search the site for "ShutterCount".