Regarding MQ's Leaders and Achievers Early Entry Scheme, UAC states that if a student's application is successful, then the student will receive an offer to study at MQ in 2022 before they complete their HSC exams. A similar statement to the one that DheerChoudhury quoted above also included on the scheme's page on MQ's website:
Students must receive the New South Wales Higher School Certificate, ACT Senior Secondary Certificate or International Baccalaureate Diploma in Australia to enrol into their offered course.
The requirement to obtain your HSC (which can only be done when you complete all assessment tasks and exams, including HSC exams) is therefore set so that you are eligible to
enrol into your desired course. This technically makes the offer conditional, because it depends on completing the HSC. However, it can be safely said that receiving an offer means that you will indeed enrol in the respective degree, because it is assumed that you will complete your HSC anyway.
I hope this helps!