Hello,
I don't know if this is the best place to talk about this, but the Switch 2 version doesn't take advantage of the Pro Controller 2 back buttons. The "Map Controller" setting only show Joy-Cons with a limited amount of inputs, and the regular "keyboard" action mapping window doesn't take controller inputs, so you can't assign those inputs to a hotbar button anyway...

I don't know how other platforms handle this with their own controller, but a simple fix would be the ability to map hotbar buttons to controller inputs ? Or to just detect the Pro Controller and adjust the relevent settings.

Thanks !!