Even taking creation out of it, it’s always been a silly question. An egg is just a stage in chicken’s process of self-replication, not vice versa. The whole question is only possible because birds gestate/incubate their embryos outside of their bodies. That’s why no one asks what came first, a human egg fertilized by human sperm or a human.
So what? He created the chicken first and the egg is considered ירח אמו until it comes out (look at ביצה that doesn’t consider an egg anything until it comes out)