@ThoroughbredFun, thanks for the save. I have no idea why your Blacksmiths aren’t crafting the forge. The items neccessary are certainly within reach, and you have plenty of them. I was able to get them to craft the forge (then place it so the ingots could be crafted) was to demote both blacksmiths back to workers, then promote them again. I’m going to ping @Relyss to see if she can figure out why they are “stuck”.
No, there isn’t a command to do this. At the moment, the game doesn’t “know” what items are reachable and what aren’t. It’s possible there could be a command like this in after A21 is released, as @not_owen_wilson’s reachability service might be able to determine this. The command dump_inaccessible_items doesn’t have anything to do with unreachable items, more like items that got “lost in the void” of the game. The command is old, and I’m pretty sure the bug it was created to debug has since been resolved.