Your student visa (condition 8202) requires you to maintain satisfactory academic progress in your studies so you are able to complete your program within the specified visa duration.

We are required to monitor your progress to ensure that you complete your studies within the duration specified in your original Confirmation of Enrolment.

https://internationaleducation.gov.au/Regulatory-Information/Education-Services-for-Overseas-Students-ESOS-Legislative-Framework/National-Code/nationalcodepartd/Pages/ExplanatoryguideD10.aspx

Information about your School's Academic Progress Guidelines (pdf, 17kb) will be available to you on your enrolment.