Question about Prometheus & Alien covenant In Prometheus,

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Question about Prometheus & Alien covenant

In Prometheus, the virus was spread through multiple people, went through stages and and different lifeform hosts before finally becoming an early version of the xenomorphs at the very end.

Alien covenant didn't show any of that. After David released the virus on the inhabitants, from what we could see it just seemed to instantly produce whiteish xenos without going through the same stages in Prometheus but ending up similar? Are we just supposed to ASSUME a similar process happened?

It just kind of irked me. In Prometheus, the prototype xenomorph seemed kind of like an accident, a product of it being passed through multiple hosts and different lifeforms. But in covenant it seemed much more direct, straight to an xeno with only one kind of host. Just seemed like two different approaches in the movies to how the same virus was shown to work, unless I'm missing something.