Relaxing is maybe the wrong word use. CHANGING would be more appropriate to acceptance of the rapid test either at the departure airport OR on arrival.....on arrival is probably less secure but better than nothing
Also off topic (kinda) but as of 10/26 Costa Rica is eliminating the COVID test requirement for US residents
Good enough for Hawaii...should be good enough for SXM...BUT....the airlines/airports will have to take the ball if that is approved and I think they will