Trending @Accenture; The expectation for moving to managerial from lead role is doing manager tasks ... Then what managers would be doing sorry...

SM tasks for their movement, if they want it. Else, managerial tasks. It's not like you become an expert at managerial tasks in one go. It takes time to improve, understand and get desired outcomes. Also, not all managers also perform at the same level, so there is always scope for improvement and learning even at the same level.