I have noticed on my EMR local comute that although the guards have stopped doing tickets checks when the latest lockdown started, they have been walking through the carriage and scribbling on a bit of paper when they get to the end. I assume they have been doing regular passanger counts which I assume have played a role in informing the cuts.
Yes same on my routes although I was told they were using an app which is at least a little more high-tech!