If one would have such a powerful mythical beast, why would one want a youngling? Even if the Phoenix would advance to a mythical-level beast when it reached its adulthood, it was a long wait for a human. During its growth, the little Phoenix would only be an advanced-level magical beast.
A human can only be contracted to one magical beast in their entire life, and therefore, the human before them had no reason to snatch their child.
Furthermore, that overwhelmingly powerful mysterious man seemed to have a close relation to her.
With the two great assistance by her side, she would not need a young Phoenix.
Once they had thought things through, the Phoenixes were not as hostile as they had been toward Shen Yanxiao and the Vermilion Bird.
Magical beasts were mostly innocent and naive creatures. There was only right and evil in their world.