Well maybe theres a reason for that. I understand though, not sure why they hide items however from a developer stand point, they are probably using a template for these routers and it's up to marketing on what gets used and what doesn't, depending on the model and use of the router. So having one template for there FW is probably easier to use and manipulate. Just because it's hidden doesn't mean it was supported or meant to be functional in the first place for all routers.