what are the items labeled “???”

I don’t know and I think we shouldn’t know until we find them

Do you have a screneshot? If so, can you post it here?

Those are items that you pick up that you need to “identify”. It is a button in your inventory, it will show you the items information after you identify it.

Ohh those are the legends you have yet to have or find while grinding. Hehe keep farming and those will show in your codex with description.