Please go to the 'Approvals' view to check which users have not submitted their timesheet for a selected period, or to check which users submitted less or more hours than their target hours.

First, you need to make sure to select the correct date range on top. You can choose from preset periods or set a custom start and end date from the calendar.

The data in the view will be shown for the selected date range only.

Next, if you click on the 'Submitted hours' column name, you can sort the data by the number of submitted hours:

This way you can quickly identify users with zero submitted hours or notice any other outliers.

If you need to download the data, this can be done here: