This USVI Govt SITE was Updated 9/21 and should be checked over time:

https://usviupdate.com/

As of the 9/21 update you must have a Covid-19 test "TAKEN and received within 5 day of travel"

As far as the illustrated Jan travel itinerary by cwoody:
It is pretty much an unknown at least on the USVI side if the restrictions will be the same or have changed [more or less restrictive] by your Jan. dates. Our Governor is keeping the situation looked at and responding to change.
I see many things that we have always accepted and gotten used to changing dramatically - with many never returning - what is being called :New Normal"