The mods have decided not to allow the Apex Armor in-game at this time, due to its nature as a relic of the Firstforged and its nigh invulnerability.

If you wish, however, Miko is cleared to find a generic combat exosuit similar in design to the Apex Armor, but only capable of providing her with the resilience of a similarly-sized transformer. It'll need a bit of a polish but it's in working order - just be careful and remember you're not invicible in it, Miko!