Hi @chriscas , I think that the forum is extremely useful in so far as it confirms that there is no universal view of how Canvas is implemented or managed across different institutions, institutional types and national educational systems, which puts us all on notice that the support and advice that we give should always be considered both partial and conditional.
Implementation of any LMS is a big ask for any institution, and whilst we might like to imagine that at institutional level (and indeed below) local teams responsible for making the complex links between their local Student Information System and Canvas have stuck to the grand design and functionality envisaged by Instructure, the forum is revealing differences, certainly in our case. That isn't a complaint or criticism - like the bumble bee, the wonder of SIS integrated LMSs is not that they fly well but that they fly at all.
Philosophically I would suggest that LMSs have always been more oriented to the hobbyist/bricoleur teacher-enthusiast, offering them maximum flexibility (the principle of requisite variety) which may not be operationally suitable, provide a consistent student experience, nor meet inclusion and regulatory requirements in a way that a narrower set of templates and tight integration might do (principle of preferred patterns).
In our case our specialist teams have implemented a series of tightly coupled SIS integrations which are highly effective in controlling course provisioning, assignments, due dates, mitigations etc., but the cost of this is that they appear to operate using processes that run in parallel to Canvas, rather than through the suite of API integrations.
So the answer to the question is that our central team have determined that we shouldn't have access to the native delete or refresh button (ie we don;t see it at all), and I can only see this being revisited as and when the resources are available to further fine tune the parallel systems and processes - unlikely in the UK HEI context right now.
The discussion is useful, as your insights are showing where we might be able to move some of our operational load from bespoke parallel systems back to take more advantage of the native functionality.