You are unable to locate the Resource Scheduler work center in the mobile devices.
SAP Cloud for Customer
The Resource Schedule is not supported on mobile devices.
The Resource Scheduler feature is not available for Mobile devices in the Cloud for Service.
Further details are available at our SAP Mobile documentation:
In case you have integration with the SAP Field Service Management (FSM) product, you can use their Resource Scheduler App, which is available for iOS and Android devices.
Android; Cellphone; , KBA , AP-RC-UIF , C4C UI Framework , How To