They call it “productivity” but it’s more likely just busyness. Microsoft research into the use of their Teams product has discovered there are now three peaks in a day. It used to be only mid-morning and early afternoon, but now another peak has appeared at 10 pm. Euphemistically, Microsoft equates keyboard activity with productivity, but keyboard activity at 10 pm is unlikely to add much value for most people.
The workday has expanded by 46 minutes since the start of the pandemic, and most of that has been after normal office hours. It is a leadership task to preserve the health and productivity of your people. Do your employees work at 10 pm? Are you okay with that?