Two fight sticks (PXN) on the PS5

I am trying to use two PXN fight sticks on the PS5. Unfortunately, I had found out that you also need dual shock controllers. I had bought those which I connected to the PXN. I had then connected the PXN arcade sticks to the USB ports on the PS 5. One in the front, and one on the back. However, the PXN sticks themselves are not working although I saw brief demos that do show that they work. Can anyone advice. Thanks