Hey @Sarah441 It wasn’t meant for you to code something, sorry for my lack of clarity.
My comment was that there is nothing you need to do. Your policy pages should not be indexed and Shopify is doing exactly what they should be doing. What’s happened here is that you’re linking to your policy page from a product page that is indexed. Google will attempt to crawl all links they see. In this case, they “see” the policy page because it’s linked to from the product page so Google indexed the policy page. But Shopify is saying “Wait, we don’t want this indexed, please don’t spend resources crawling this page.”
So Google will then send you a notice (your screenshot from Search Console) that says we see this policy page because it’s linked, but we’re not doing anything else with it. If you don’t want that, take action.
But Google is doing exactly what you want it to do, so there is no action required. You can ignore that particular issue.
Additionally, if you are not a developer, I wouldn’t go futzing with creating a robots.txt file outside of Shopify’s. You’d have to maintain that and any future changes.
In summary, leave it as it is and focus on more important areas of growing your business.