To anyone who is searching this thread and has this issue, I JUST resolved it. I found a developer who was able to get it fixed very quickly for me (this is after working with a google tag manager and trying to search online for hours for how to find the solution myself-with zero success).
He set up my google tag with all the data for the tag to be able to pull my product ids, value, etc, and all the data pinterest needs for a healthy tag. He didn't need to go into developer mode on my site (some developers I spoke to said they would need to and that just made me very nervous), and it was a pretty quick process for him to write the code and get it all installed and affordable.
I highly recommend him. Assuming it's okay to share his info here, his email is george.dilthey@gmail.com.
He saved me SO MUCH TIME and brainspace. My verified merchant status is not up and running with a healthy tag and my ads manager is now getting all the info she needs on the backend since the data is pulling through.