How does Google rank Amazon products in SERPS?

It's been a few years since I've done any SEO, I know much has changed. I actually have an Amazon business, and a competitor ranks in Google for our main keywords. I threw the Amazon link in a backlink checker, and there are no backlinks. They have no social media either. Their company website doesn't have any outbound links, no address or phone number. I would like to start an off-site set campaign to get my product to replace theirs in the google serps, but there is very little information available ranking Amazon products in Google, and those are outdated. So... what does Google look for when ranking Amazon products?