Hacking IG Shopping Functionality without Website Shop?

Hi, has anyone here managed to create a Meta Commerce Account that is eligible for Instagram Shopping without having a Checkout Option on the Website that is being linked to?

I’m getting this error message, because it’s currently not possible to buy at the website I linked:

I am also wondering how Meta is checking for the Checkout Functionality - so is a “buy” button enough to pass the review or does it need a shopping cart functionality or even a “proceed to checkout button”.