I just booked a flight to St. Thomas on Delta. They have every middle seat blocked off on the 757's and A-321's so a couple has their own row. For the E190s for the short BOS-JFK part (2x2 config) they block off the 2nd seat (B) in EVERY row making it a 1x2 config.

I agree the issue is with the contacts before getting on the flight but masks are mandatory....kinda the same as going to Costco