Why won't my Facebook Business Page connect with Shopify?

Hi,

I am going through the steps to set up Facebook marketing on Shopify and getting stuck on the Facebook Page section.

It is saying there is no existing business page but there is. I have confirmed that I am the admin, the page is published, domains are verified etc. with Shopify support and nothing has worked. I have gone through these steps before on other projects without issue.

Any help would be appreciated.

Thanks