I see article about Saxion CMGT Major are using the unity as their software for some of the course. I’ve been using Unreal engine 5 for the last 2 Years for my projects, is it possible if im sticking to Unreal during the creation process?

In your own personal projects, sure. But for a lot of the study, we'll be learning Unity rather than Unreal. You will be partaking in many team projects with designers AND engineers who will probably only know Unity.

It's good to be varied in this though. So, if you are making anything for yourself I recommend you stick to what you know best.