If you mean you're just now applying for the license and therefore haven't received approval yet, I'd think it would be appropriate to initiate a voluntary recall for those ~ ten devices, and "un-sell" them.
I'd think that would be the best evidence that the company takes its regulatory obligations seriously, and should be given the approval even though it broke the rules.
You may have to lean on the customers to give back the units. No wink-and-nudge "just keep the unit and this will all blow over". I'd think you'd need to show not just lip service to the rules, but an actually effective recall.
If you have just now identified that some sales were made without having a license...did your system fail, or was it an intentional decision by someone to override or ignore the requirements because they wasn't as important as making sales?
In the former case, a documented system improvement and a disclosure report to Health Canada with an apology from top management might be a good approach. I don't know what Health Canada would do next, but I assume they'd respond with a mild admonishment to not do it again.
In the latter case, you have a problem. I assume you're back to the recall, but I don't know what Health Canada might want beyond that. If the Canadian market is important enough, maybe whoever made the decision to override the system should be disciplined, to get across that top management or the owners realize that legal compliance is involved.