One of the best things I heard from my company's CEO when they moved everyone over to WFH was 'your productivity is going to go down. It just is. It doesn't matter if you were fully WFH before, it's going to go down. And that's ok. And I've told your managers to expect it, and to not let you stress over it.'
Then leadership modified the metrics that bonuses are calculated on, so that the slowdown wouldn't affect our ability to get them.