Oh! sorry! i'm currently playing both scenarios on PBEM and mixed the africans!
Regarding Juba's men... mmm i have some of their non phalanx infantry units fighting around Sicily and Italy supporting Pompey legions and don't recall issues with their replacements...
I will check in game and report back
EDIT: Indeed, on Caesar vs Pompey Numidians only have cavalry replacements...
But what puzzles me is that on my game my numidian infantry is in pretty good shape, near 100% health, while other factions troops for which i don't ever buy replacements for like Lagides, Capadocians etc because they are locked and far from the front are in pretty depleted (around 50-60% health) because of the historic attrition option effects after 25 turns.
And that's even considering Jubas men have seen some action helping Pompey on Sicily or Italy or crushing rebelions on Africa, whileother factions have done nothing except sit on their cities...
It looks like numidian infantry are using somebody's replacements but no idea which ones... romans maybe?
Regards!