The EOS R5 firmware has been updated to version 2.2.1
This incorporates the following enhancements and fixes:
1. Fixes an issue that, in rare instances, may prevent certain CFexpress cards from being formatted in the camera.
2. Fixes an issue that may prevent the camera's firmware from being updated via an Internet connection, even when a newer firmware version is available on Canon servers.
You can download the firmware at: https://www.canon.co.uk/support/