Old Light remained motionless, a statue of solidified brilliance. Eva did not push; there were multiple ways that the Primordial could respond to her, and the worst of them was if he chose to disregard her position and seek to consume her.
Eva was powerful, but she barely held ten percent of the total Origin of Light. On the surface, it appears as if half of heaven is under her domain, and more mortals and immortals flock to the worship of the New Light with each passing day, but Eva knew that she held only the surface layer of Light's Origin.
There were still deeper layers of this Origin she could not access, and if she truly were a great threat to Primordial Light, he would not even let her speak, but he ultimately disdained all life inside Reality and did not honestly care that Eva had become the source of their worship.