Your highest‐order contribution and responsibility as product manager is to make sure that what the engineers are asked to build will be worth building. That it will deliver the necessary results. This means working with designers and engineers to come up with solutions that are valuable, usable, feasible, and viable. That is product discovery, and that is what takes on the order of four solid hours a day. I encourage product managers to block off this time for the week, and protect that time, and then you still have half a day for other stuff.
