I don’t get their issue. If they’re actually working it shouldn’t be difficult to list what you did.
Do they seriously think Musk is going to read their mini productivity reports?
He only wants replies to confirm there are actual people at the other end who are getting checks.
Their emails could say:
• made coffee
• peed
• ate lunch
• cruised the net
• looked at porn
Nobody cares what they did except reply to the email.
I had to do this in my job, before I retired. We had to make a list of how much time we spent on which duties. It usually happened when a reorganization was going on.
No problem, no big deal.