20 to one seems kinda low in my experience. At my last deskjob it about 30-50 to 1 and it felt like a good balance. My team and I (~5 people) met with the manager once a week for a couple of hours. Id estimate they had 2-3 meetings a day with other teams. Project direction and blockers were dicussed and adjusted. It felt optimal, enough to get guidance, but they were too busy to micromanage and get in the way. Non-high-level nitty gritty day to day issues were just resolved within the team throughout the week