I found these, but I don't think they will help. Out of the 4 Shops, nobody has it that I can find
9 days ago (+1)
Its because build 12 didnt have iron. Build 13 is the Cave update with tentacles, the Twins, and has iron in the cave. (At least thats what im believing on because build 12 was supposed to have tentacles and other stuff, but it didnt.
Got confused myself too when i read the development log post of build 12 since it introduced the cave and tentacles, but there was no tentacles in the cave. Turns out that was for the Patreon build 13.
Fortunately its now updated to build 13, but the new development log post is confusing the order of what is available for the public and what is for Patreon.
Its just that when i played build 12 there was no tentacles spawning in the cave (And the cave is massive), same for Iron as there was only crystal rods and coal.
Only when build 13 arrived i was finally able to get iron and see the tentacles and the traps (Yes there is more than just the traps in the cave as there was also supposed to be tentacle monsters)
But this means also that now there is no moths in build 13, even though its talked in the dev log.
A lot of the things that was supposed to be in build 12 is available in build 13.