Thanks! I thought if there were reform units they only appeared in the building description after the reforms actually happen.
nope, because of the way these reforms work they appear in the building details before they are availabe to recruit. It is the same for the Indogreek Reforms for the Saka and the late era units for Sweboz.
The Celtic and Roman Reforms still work like in the previews builds (they use a different behind the scene system) and so for them the reform units only appear after the reform happend. The Makedonain / KH Reform have still the vanilla Marius Event.