According to The Times:
Welby had been asked whether, given that forgiveness is a central tenet of Christianity, the nation should forgive Prince Andrew. He said: “At a big public occasion [like Prince Philip’s thanksgiving service], the Queen is fully entitled to have one of her children supporting her. Secondly, forgiveness really does matter. I think we have become a very, very unforgiving society. There’s a difference between consequences and forgiveness. Now with Prince Andrew, I think we all have to step back a bit. He’s seeking to make amends and I think that’s a very good thing. But you can’t tell people how they’re to respond about this ... there’s very deep feelings indeed.”
He doesn't say we SHOULD forgive, en masse, but more hints that it could be possible. He has a point about consequences vs forgiveness, but I'm not entirely sure Andrew has faced consequences - throwing money at a problem when you have loads of money and are using it to avoid an actual court case and possible prison time isn't all that admirable. And I believe he still says he didn't do it - which asks the public to believe that his accuser is either lying or delusional.