VR Key options missing in blueprint

I want to add Action Mappings for a VR controller at runtime.
In the project input settings, Keys from VR controllers can be selected for Action Mapping:

However if I want to select a Key inside any blueprint, they are missing:

Is this a bug? Can I somehow select those VR input Keys inside the blueprint?
I need to add the mappings at runtime as I am building a mod that doesn’t load the input config.

SteamVR and other VR plugins are enabled.