It’s actually not that hard. If the assigned tasks are being fulfilled within set parameters there’s really nothing to observe and keep track of.

Apologies for nitpicking, but they do need to track if the task is completed or not, especially when there’s a chain of tasks that need to be completed in a certain order for the overall goal to be completed.

Otherwise, yeah, I was coming here to post the same thing, you don’t need to watch your workers while they’re working, you just need to confirm that they finish the tasks you assign them. If they have blocks on their tasks they’ll let their manager/lead know.