In your question, you're referring to post-payment verification work. An audit is of value when there is information and data to audit. Hence, without post-payment work having yet begun, it would be difficult for us to go in and see whether or not the mechanisms put in place by the Canada Revenue Agency to identify if payments had been made in error and to recover them if needed have worked. It's impossible to do until that work is done.
On December 13th, 2021. See this statement in context.