[UI] How can I make a customization menu like Rocket League?

Hi guys!

I want to make a customization menu like the one in Rocket League. A Scrollbox with multiple columns that needs to be used with keyboard and gamepad.

I’m having problems making a Scrollbox with a Uniformgrid. It works with the mouse scroll, but with the navigation it doesn’t work when needed. For example, if the cursor is on the last visualized row and I press down to scroll, it doesn’t work.
I’m making something wrong or it’s bugged?

scrollgrid.JPG

Can someone help me?

Thanks,
Davide