I want to see the villager's trading items on one screen.

I'm playing Minecraft Java 1.21.5.
When I trade with villagers and they level up,
 the last item will not appear until I scroll through it.
If there are 50 or 100 products that can be traded, it is understandable to scroll.
I think there are only about 8 of them. So, why not be able to display everything on one screen? It's inconvenient to make it scroll every time.
Thank you very much.