Hmmm, put it this way:
You're going to uni - to (hopefully) learn and be best prepared to work in the IT industry.
Alongside every other student in the course (regardless of experience/background) - you'll be learning everything from scratch on Day 1.
So nope, you're not expected to have IT experience etc! Of course, you do need to demonstrate your enthusiasm (otherwise, why pursue a course you're not very interested in?). But don't self-sabotage and avoid applying just because you feel like you haven't had the right opportunities to do so (my high school didn't even offer IPT/SDD etc. for HSC!). Don't let that imposter syndrome get to you!!
A common misconception with the tech industry is that people feel like they need to be 'techy' and be armed with some sort of knowledge or experience to be able to work in the field. Truth is - there is a LOT of people in tech who don't even come from IT/dev backgrounds! There are people in industry with other degrees, like commerce, arts, psychology or even med. But then why do they get hired? They get hired because of their soft skills -
like leadership, taking initiative, communication, and being quick to learn. This is because most entry level or graduate roles will have you learn a LOT on the job, and as tech continues to change, you will continue to learn, and what you did in uni won't be too relevant in the end anyway.
Also keep in mind that tech is a MASSIVE field - there is more to tech than having experience/skills to code. There's Project Management, UX/UI, Cyber Security & Governance, Business Analysts, Consultants, Test Analysts etc. I'd do a bit of research into roles that you can get into with an IT degree. Have a look at people who did the BIT Co-op degree on LinkedIn and see where they've landed for inspiration
Also, with the other reply above - yes ATAR is important, but how well you do in the interview is just as important. You'll find that a lot of applicants will end up meeting their ATAR threshold anyway, so really pay attention to your application & interview answers.
Hope this helped!
edit: source - I'm a recent BIT graduate