Hi Jasmine, I have finished my course and I am also awaiting the invitation to the Autumn 2023 Assessment, which I believe the date to be 13th October 2023.
With that in mind, I also would like to know the answer to this question. The Assessment guidelines are a little ambiguous. One part states that plagiarism checks are done automatically and later, another part states you have to submit for plagiarism checks by sending an email to the assessment team. No part of the assessment guidelines gives timescales for this, although I am assuming that this is done once you have received your invitation.