I have 3 loadouts for Rhino, and for some reason the roar setup in the middle is the only one not showing ironclad charge among the mods. Searching, scrolling, or switching to the augment tab does nothing to get it to appear. The other 2 show it and one of them has it slotted in, only real commonality between all 3 is that they all run Iron Shrapnel since I liked to periodically refresh iron skin.