Yes, it fits full-frame Canon EOS R-series cameras (like the R5 or R6), but the camera will automatically switch to 1.6x crop mode, resulting in a lower resolution image.
With a maximum aperture of f/5-7.1, it is best suited for outdoor or well-lit environments. However, its 4.5-stop Image Stabilizer helps significantly when shooting handheld at slower shutter speeds.
The standard retail package does not include a lens hood. The compatible hood model is the Canon ET-60B, which is often available as a separate rental accessory.