Feng Yuan didn't pay attention to the specific movements of the United Army, so he didn't know about this. Even if he did, he wouldn't find it strange because he could see that it was the handiwork of Agunas. Although it's incredible, Agunas's time intervention can indeed affect the future of the Time Branch.
Normally, the Time Divine Beast can influence the direction of the future, but it cannot directly decide the direction of a world. This is also the reason why humans have been unable to determine whether it is related to the Divine Beasts, after all, easily interfering with the future and needing multiple Divine Beasts to jointly labor to intervene in the actions of Imperial People are two completely different concepts.
