Teams will show me in my home office as usual. The icon already turns yellow if there has been no keyboard or mouse action in the last 5 minutes. This new feature must be in response to the scripts or applets used to simulate “busyness”.

Years ago I made a device for a doctor that would move a mouse every few minutes so that he could stay logged into patient records long enough to think or interact with a patient. Maybe I should put them into production.
Have an office cat. The second I leave, the cat is on the computer pulling up who knows what.
I have a ‘mouse mover’ at home. However, I plug that into my personal laptop USB, so it doesn’t ever get recognized by the work laptop.