I tried this avenue and searched for schools in Australia that had a similar uniform. So far, I’ve only found one all girls high school that utilizes something similar, however not an exact match.

Will share here in case it helps anyones search.

Also, my take on this outfit combo is that it’s not all school uniform. I believe the jacket could be unrelated, and possibly bought at a local mall or shop. However, the vest has to be a school uniform, as you can see a small white crest to the left, or our right, of the sweater