We have a similar situation. Passes expired on 3/19 and listed in the app as "Expires 3/19".
The question is, when they reopen, would we get our 3 remaining pass-days from the day the parks reopen, or ALL the days that the parks were closed (example 45 days in the exceedingly rare case they were to open on May 1.) The language below leaves me confused as it seems to point toward the second case, but realistically we'd only expect to get the 3 days.
All active Walt Disney World Annual Passes will be extended for the number of days the parks are closed.
We wouldn't be disappointed either way, just a nice bonus if we did get a longer extension once they reopen. Right now anything positive regarding this all clearing up would be great news, tickets or not.