I’m responding again bc my Pinterest profile was selected for their marketing partner program so I got a chance to ask a Pinterest expert about this. Their integrations with Shopify are in beta phase and are closed, that’s why nothing works and you can’t get answers.
My catalog still isn’t connected and I have to wait until they open beta testing again to even try or get help with it.
This doesn’t mean there isn’t a work around, it just means you all aren’t crazy, it doesn’t work.
I literally pinned every product from my site to my profile when I first opened my store. That works just as well bc the pins are shoppable.