As you can see in the report, we excluded the U.S. in all of our datasets because our trade with the U.S. is still so large, even though we have a mandate for trade diversification. This is because shifting the supply chain is very costly and takes a lot of time. Countries will always be trading with other countries that are larger in economic size and closer in geographic distance.
Trade agreements and institutions that are in place do make a difference, but ultimately it's businesses that trade, so that is what determines the flow.