The reason it's not Supreme isn't his problem; it's the problem of the Great Universe.
He is somewhat ahead of his time, so even though he has reached the Supreme Realm, because the Great Universe is too young, it doesn't feel so strong.
The King explained to him: "You can understand the relationship between Supreme and Universe as that of an egg and a chick. Normally, those who break out of the shell are Supreme, but there are some eggs that have innate issues, are immature, so the achievement of the Supreme and the initial combat power in other universes differ. But it's not a big problem. Once you break the shell, it means you've completely separated from it. The future paths are yours to decide, and you can compensate with nutrition later. You just need to accumulate your foundation over time, and you'll be no different from us Supremes."
Hearing this, Lu Chenzhou finally understood how impressive the Four Emperors were.
