Not sure when the instructor approval will arrive? Learn all about instructor's approval here!
The teacher gives the Instructor approval, so it is up to the teacher when the final result will be available. Approval can be given at any time after completion; there is no time limit. In other words, the teacher checks and approves the solution at a time of their choice, and the system will notify you about it. You can keep track of the notifications in the top right corner.
Importantly, the result can be overwritten at any time; therefore, the final result is only obtained after approval (even if you see the result and its auto-correction immediately after submitting the worksheet).
Note: There are cases where the instructor does not check and approve the result, especially when the teacher trusts the auto-correction and does not feel the need to check again (e.g., in the multiple-choice type of question, the automatic correction is maximally reliable since it is based on the solution key provided by the teacher).
If you have not received the Instructor approval and are unsure if your result is the final result, contact your teacher!