>>>Will they be moving back the due date a correspondingly amount of time?
No information yet.
>>>FWIW, we haven’t received our relief check yet.
Check IRS site, https://www.irs.gov/coronavirus/get-my-payment
Click on the Get my payment tag. You will know whether they have sent.
I have problems with USPS.
We got ours yesterday in the form of a debit card.
Last time it was deposited in our account.