I don't know if they made any statement, but who would it be addressed at? If it's their family (though I can't really imagine QE ringing up Harry to ask), then you don't need to make a public statement. Likewise close friends. Are they being constantly questioned by the press? On social media? It's not really their style to make major statements just because people are asking, so it seems odd to do so now.
They shouldn't feel obligated to try. The whole point of the past year has been for them to do what's right for them.
Do they have pets? Next year they could just put them on the card, the reactions would be