Have you contacted your TA recently? WDW shifted from “closed thru 3/31/2020” to “closed until further notice” and I don’t expect any additional official announcements until WDW is ready to open. They have already removed ability to book anything (resort, tickets, ADRs, FP, extras, etc.) through May 31st. If that isn’t enough indication that the reservation will cancel, I guess you would have to wait for the 3rd party TA to accept the situation. I believe WDW is systematically cancelling in order of arrival date.
Sorry your trip is impacted, I hope you can reschedule soon!