It'll be released.... Eventually.
I'm working on two projects at the moment; one that features many non-human races (albeit not specifically fantasy) will probably come out first, since there's a whole world/lore there and that's been my favourite one to work on lol
That would be something to contact PureOS about. You could open a bug tracker here: https://tracker.pureos.net/ and see what they say, though it seems pretty inactive. They'd have to implement a patch of some kind or get Debian to update the 0 A.D. version in testing (which is what I think PureOS pulls from)