We have two domains. The user selects the product on domain A and checks out on domain B. We are using the Meta ad account of domain A to run the campaigns. We are setting up CAPI to fire from domain B, (as this is the conversion destination)

We are using Postman to run our attribution test cases using CAPI. We are passing the email ID in the CAPI payload. The issue we are having is that we are seeing the CAPI events in the Meta Events Manager tool but they are not being attributed to the ad.

Can you please provide pointers to address this issue?