I feel like I'm doing something dumb, or don't fully understand what the Scene Import is doing, but I only get all the attrs from sops when I use SopImport. Is there something I need to do to ensure all attr come through with the Scene Import Lop when importing Objects?

I've got all the boxes ticked in the Import Data tab but the attrs don't appear..

Specifically I am importing a Houdini Groom and need the curveu attr.

Found it; on the OBJ-level Hair Generate node, there is an Attributes tab and an Output Attributes section. Attrs can be added there.