There have been several posts here with questions about what happens if you test positive while on the island. I don't have any answers myself, but there's a recent post on TripAdvisor from someone that is currently traveling and has tested positive. The post is asking about what is covered by the $125/day provided by the mandatory insurance in the event of a quarantine. There's not much more than this question yet, but the thread may be of interest if additional information is eventually shared.

https://www.tripadvisor.com/ShowTop...tive_for_COVID-St_Martin_St_Maarten.html