You'll find out more about this once you do all of the orientation stuff and settle into the course, but it's very rare for a UTS Engineering student to follow the recommended study plan the whole way through. Some combination of internships, finding employment/transitioning to part time, going on exchange, taking subjects during internships, overloading in other ways or avoiding overloading the practice program subjects, timetabling issues or failing subjects cause most people to diverge from that plan.
I would recommend enrolling in the 3U bridging course (free for UTS students, just a $25 booklet to buy). If you find it's not useful, then stop going, you really don't have much to lose by doing it.
I would also suggest listening to what the UTS staff have to say, there will be many in your situation (especially if you go to the bridging course) so it will get covered at/before orientation or at the very start of the semester - most likely whenever they are conducting the readiness survey. If you pass the readiness survey and are comfortable for the first few weeks of MM1, stick with it and put in the effort you need to put in to pass. If you don't pass the readiness survey, then you have no choice but to take Foundation Maths.