A cybersecurity manager's responsibilities will vary tremendously based on the size of the team and the industry, but here are some common responsibilities.
Transparency for the Board
The CISO is involved in briefing the board members on cybersecurity, but depending on the size and maturity of the security program in your organization, this may fall on the cybersecurity manager. If this falls on the manager, focus on communicating the state of your information security program, including your successes and failures.