Comments of chapter undefined of Reborn as a kryptonian

does the MC have the codex in his DNA to be able to make the Kryptonian race or is he just an ordinary Kryptonian because if he doesn't have the codex it's impossible for the Kryptonian race to emerge in this universe even if he uses his own DNA he won't be able to clone more Kryptonians already that pure Kryptonian DNA is virtually uncopiable as all 100% Kryptonian clones end up deformed, physically unstable, mentally dysfunctional or monstrous