Do the Scions know? (Spoilers)

[Veloran]

There were other races coming into being post-Zodiark, after all, which became the focus of groups like Venat's.

We actually have no evidence of this. Half the Amaurotines were sacrificed to restart the proliferation of life on the planet, but we're never actually told that this life is materially any different from the rest of the unsundered life previously existing on the star. We also don't know the timeline of how long this went on before the Anyder summoned Hydaelyn and the Sundering happened, or whether any sort of new races/species ever came into existence in that period. Personally I think Hydaelyn is directly responsible for what forms the sundered life took after the star was shattered.

Obviously souls can exist outside of all this as evidenced by the dragons, so for Alpha we should just assume he developed a soul on his own.