Data asset texture maps

Hi all,

When creating a new Data Asset with Building Texture Data, there are only three slots for texture maps: diffuse, normal, and specular. Is there a way to add other maps to this? Specifically looking to add a roughness map in here.

There is an option to use an override material instead, however this will not work for my case as I’m looking to use the primary and secondary slots of the FN props I’m trying to add textures to.

Thanks!