Hello, I think you have missed or overlooked one point.  This issue or "non" issue causes other underlying problems in GSC.  It confuses which page it should actually reference. So it takes what would be the primary page and will no index it because ...

Just to confirm.  You'd like all affected URL's?  In my case that would be over 200 actual product pages and over 6,000 canonical page errors. 

I received this response from support!  First off, shopify created the issue.  They at first blamed Google and said the links were created by Google.  Now they are telling me I have to pay for a support partner to resolve it as it is "complex".  Uh, ...

Hello, the bigger question I have related to an excessive amount of Canonical Tag Errors is, what is causing them???  I have a bunch of garbage/code behind a products link starting with a "?".  Since support cannot answer this I'll ask here.  What or...