To view your own work schedule, simply tap on your profile icon (profile picture) and scroll down to see your personal schedule. Each day will indicate how long you are expected to work and from what time to what time, on a weekly basis. Your schedules are set by your manager and can be changed at any time.
To view a coworker's schedule, simply navigate to a coworker's profile from the company tab → people sub-tab or company tab → teams sub-tab or from anywhere else in the application. Your coworker's personal schedule is displayed and shared with all other coworkers in the exact same manner as your own.