The Timesheets are able to approve by the Project Manager who not assigned to the respective Project

Navigate to Setup > Accounting > Project Resource Roles 

1. Job Resource Role

• Project Manager:

1. Click Edit
2. Project Time Approver: Enter Checkmark
3. Own Time Approval: Enter Checkmark
4. Click Save

• Project Staff:

1. Click Edit
2. Project Time Approver: Remove the Checkmark
3. Own Time Approval: Remove the Checkmark

Click Save

Navigate to Setup > Users/Roles > Manage Roles > Project Manager Role used

1. Click Edit
2. General:

• Employee Restrictions: Select none – no default
• Restrict Time and Expenses: Select Checkmark

Click Save

Navigate to the Project record

1. Click Edit
2. Click Preferences tab

• Time Approval: Select Project Time Approver

Click Save

Note:

1. Given the following setup, time entries by a Project Staff will be directed only to the Project Manager assigned to the Project.
2. By default, if the Own Time Approval = T, Time entries by a Project Time Approver by will be automatically approved.
3. If Own Time Approval = F, and there is only one Project Time Approver designated on the Project, once this Time Approver entered his time, it will throw a warning message: “No Project Time Approver is assigned to this Project. Time for this project must be approved by an Administrator.”
4. The Next Approver field on the Time Record will only be populated if the Approval Routing for Time is enabled and if there is a workflow set for the approval routing.