wordpress and shopify developer need

Stores are ready just need to integrate checkout , below is samples :

https://roberta-outlet.com/ <- BLACK STORE (Shopify, stripe didn't see)

https://elcoange.com/ <- WHITE STORE (WP, stripe did see)

(I can provide both samples stores login password)

One only for stripe

1 checkout need to be 2 sites

1 white
1 Black

White its only for stripe when they to reviews
The sales came from the black one

but in the Stripe's metadata show the sales came from white one.
check the attached diagram flow