...you ever seen how prevalent iron is IRL? hematite, pyrites, ferrites, etc etc
If anything, it should be MORE abundant, with all the variants we've discovered and exploited throughout history
in situ veins
sulfides that need to be roasted
pyrites with precious inclusions
my personal favorite, bog iron that you'd find with peat
However, I believe the balance to this is that each type of deposit would have a different processing requirement, both for liberation and for smelting into a usable bloom and ingot