We do not know if the theological conditions have been met by Prince Andrew because in the Anglican Church you can meet these conditions through a private confession with a priest. That confession cannot be made public.
Agree forgiveness only comes from the grace of God via confession.
However, the Archbishop isn’t wrong to comment on how society is getting very unforgiving and that it is in stark contrast to the Christian doctrine to forgive. I don’t think he was wrong to say people need to step back a bit and so on. He’s a priest…an archbishop! So of course he’s going to give a sermon on how people need to be more forgiving when he thinks they’re staying from the righteous path. Again, it’s his religion and his beliefs about forgiveness are protected beliefs so I don’t think he should face any backlash over being more forgiving than you or others might be.