I am in a similar situation. Booked Alaska cruise for June that was cancelled by Royal Caribbean. Booked airfare separately through American. Requested refund for cruise. I was able to cancel hotels and excursions booked on my own without penalty. American Airlines COVID special cancellation policy is currently running through the end of May.
I had purchased Nationwide Cruise insurance to cover the entire trip through insuremytrip. I called Nationwide travel insurance today regarding my airfare options. . They said no coverage for COVID, unless I am specifically ordered to quarantine by my doctor. Shelter in place, pandemic, cancelled cruise, etc. are not covered. No recourse, unless I have a medical reason to cancel.
I inquired about a claim for itinerary change, which has to occur before the cruise according to the policy. No coverage for this either, as the cruise has to take place in order to make a claim.
Asked about refunding for the cost of the insurance policy. They are not offering refunds, but recommended I contact insuremytrip. Insuremytrip lists on their website policies are non-refundable after the initial review period.
My only recourse will be through the airlines. They have to have at least a 61 minute change or a cancelled flight, in order to get a refund. I guess I'll wait and see and request a change voucher closer to time of the trip.
Granted, I've usually just purchased the cruise insurance in case of cancellation for medical or medical evacuation in a foreign country, but cruise insurance has been a disappointment in this case!