Keep in mind that they are private boats, and their presence is usually not completely legal? That whole check-in check-out thing gets in the way sometimes.....
I don't think these guys coming over from PR with their $2m+ sport fisher, towing their $400k center console, with 3 or 4 $12k efoil boards are going to risk immigration and potential seizure issues to avoid a stop at West End or JVD. Filling out the gateway and taking a rapid test (which I've heard they are currently skipping) isn't that big of a deal.
There has been a noticeable increase in marine patrols including the customs and police boats. I think they are mostly patrolling for curfew but I'd bet the increase in private boats entering also has their attention.