Stephanie here from Shopify's Guru Team.
If you have the Canada post app installed, there is an option within the app to add coverage!
Currently, it's not a feature of our new integration; however, the app called Shippo, which integrates with Canada Post, has a shipping insurance feature so I would recommend looking into that :)
Hope this helps!
Randy_Spearing : You can add insurance by selecting coverage/insurance in the Multi Carrier Shipping label app. It shows the final rates which include coverage against loss or damage. The availability and the limits of liability coverage depend on the service selected, country of destination, and the nature of the items being shipped.