UPDATE. I am now in SXM.

Upon arrival customs will ask for 3 things:

Your passport
Your printed EHAS Approval
Your original rapid Antigen test results from whatever you submitted

Once you clear customs. They are x-raying all bags.

The next morning you will receive an email from EHAS. You must self monitor for 5 days by replying to their email with your temperature and whether you have any symptoms. It is only for five days and takes 20 seconds.

I will post other information before I return.