I believe that managers are judged by the people they manage. I was blessed enough to have great manager(s) during my career, learn from them, and apply my knowledge in my leadership positions, and in general throughout my career as senior engineer.
Back in my time at Autodesk, I submit a talk proposal titled “How to be a great manager - an insight from a non-manager perspective” to an internal knowledge sharing conference. My proposal got rejected, but the knowledge I had, aged. Like wine. So I decided to share it with everyone.