I think it's important to note that you have an infinitely usable turn cheat icon on the overview map (Joker card), and pretty much everything you do on that map is optional flavor, and not something you have to do to advance the game. The little "gacha" is just some fun, not something required for anything. It doesn't give you scenes or quests.
Iron is produced from the mine in the north, and in the "deep" mine you can construct during the quest for anti-heat equipment. If you have the mine but no Iron production, then it's a bug.
It's not a perfect solution, but the storage icon in the overview map allows you to check the amount of troops you have.
Whenever you require a resource for something, the text should show the amount you currently have, to make a constantly shown UI of all resources not necessary anymore. Cases in which different numbers are shown for the same resource in different places are bugs. They should obviously be the same, but there were a few places where I made the wrong number show in the text. Hopefully, all cases of this are fixed for the next update.