These types of metrics don't really work in jobs that aren't production/call center/data entry type roles, where you start the day with a pile of X and just plow all day on processing it into a pile of Y. The more senior and mission-critical a role is, the less likely a metric like this is to measure anything useful. It's like Elon Musk demanding his engineers bring him printouts of all the code they had written when he took over twitter, its just silly and only serves to reveal how wildly out of touch executives are with how value is created in their organizations.
What this metric would be effective at is heaving off talent with great force. Its one thing to be forced back to clocking in and out like a teenager at McDonalds. Its annoying but ultimately doesn't get in the way of doing your job (aside from throwing off schedules working with people in other time zones). Despite the complaining on here, and I've done plenty of it myself, I can make peace with returning to office. If that's what the people signing the checks say is important to them, whatever. But I've worked in call centers in my late teens/early 20s, and having a computer hovering over you at all times with a stopwatch goes well beyond annoying. Its oppressive, one of the worst environments I've ever worked in. A metric like this would finally trigger the attrition that executives are looking for, and well beyond, starting with the people they can least afford to lose. We joke on here about HY wanting us all dead but going forward with a metric like this, in the same way they've gone forward with the 8 hours thing where there's zero room for nuance, would likely be the nail in the coffin for this place.
So, it doesn't seem worth stressing over. Either they don't go forward with it, because some member of the C-suite has held on to a shred of sanity. Or they go forward with it and it instantly blows up in their faces. Or they go forward with it, and this ceases to be a place worth pulling a paycheck from. Either way, its out of my hands, and not worth losing sleep over.