Thanks for the reply!
I do have a normal TV, the problem is that the HDMI cables I've ordered along with the pi 4 don't work. I'll have to order new ones to test at a later date.
The reason I just kept working on with this screen was that I wanted to build a small (4:3) bar top arcade with it.
Now, knowing that this screen won't work for this, I'll have to research for a suitable replacement as well.
Thanks for the help :)
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first