HELM vault HA lasck on understanding

Hello all,
I am learning to setup vault using kubernetes and almost every guide out there is explaining using helm charts. This really does makes sense as using helm is really easy to get vault up and running. My doubt here is how does it run in the background.

Previously on docker container, i created afew vault nodes and exposing them to different port which allowed to me to view vault on each node. From there i had the flexibility to test the HA, view the raaft voting process etc.

Now with helm, most probably cause im still new, I dont understanding how is vault being setup in the helm chart. Is there a document or article that Im missing?