triggers re set to use custom events with the above name (like in other accounts we have the same setup)
It appears that you are checking the tags rather than the actual presence of events in the data layer. Your tags may fail for some reason, so I recommend first checking whether there are data layer events on your product pages.
The data layer works based on the Shopify Pixel API, and if these data layer events are indeed missing, it means that the Pixel API is not aware of them either. This may be due to the use of any third-party add-ons or applications for product pages.