workers can register time in a separate worker order timesheet screen, to register time for lines in the timesheet that are related to a specific work order.

Example: a worker works on a project of customer xyz, on project abc, and a bunch of time registraiton lines are for the same work order:

The work order timesheets require the setup of work orders:

Via +NEW you can create work orders. Via the 3 dots you can edit or delete work orders from the setup, as long as not in use in a timesheet.