Service Providers are only able to see their Work Calendar, Non-working Hours, Work Hours, their Assigned Bookings, and Personal Settings.
From within Settings / Access Rights, administrators are able to specify whether service providers can see full lists of/view specifics/or edit: Customers, Work Hours, Non-working Hours.
Related Resources 👉How can my Service Provider’s password be reset?
How can I add other administrators & service providers?
How can my employee see their assigned bookings in their own external Google Calendar?
How can I import and export my customers?
How can I see my assigned bookings in my own Google Calendar?