This is already accounted for when grade boundaries are set. It's impossible to measure how each person was impacted by covid unfortunately. (you can give x near misses the grade above, but what about those who fell a few marks short of that? It just keeps on going like that) Short of giving everyone the top grade, there's no way to mitigate that'll help everyone.
I've seen stuff about generosity but no indication that they'll just copypaste the distribution. (?) Just that they'll focus on qualitative analysis especially this year.