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.