I find it very weird and limiting how it seems that VRChat continues to handle this gesture rather than letting Steam handle the "long press". It should be part of the default binding, with the option to remove it from the bindings and customize how it can be opened.
For extra context, I want to be able to set the action menu to another gesture, and use the B button long-press for something else. This isn't currently possible.
It would also be nice for it to be part of Steam Input so that the "long press" length could be customized.