I thought everything you could build with the materials you've currently found appear in the list, but you do have to go into (hover over?) each item to find out what that particular thing actually requires. It does mean you have a list that includes things you have far too little iron for, for instance ... but that also means you know what you have to do to get create these items.

If I have an annoyance with this system, it's that I have to remember which things are built at the workbench and which at the forge. It's not always obvious. But that's my memory's fault rather than the game's!