What's the index URL for Helm charts added to ACR?

I'm following this guide on how to "Push and pull Helm charts to an Azure container registry".

So I've pushed a chart to ACR. I can see that it's there, both via the Azure UI and

az acr repository show \
  --name mycontainerregistry \
  --repository helm/hello-world

Is there a repository URL that I can use to configure others (in this case Flux v2) to pull charts from? I thought it might be https://mycontainerregistry.azurecr.io/helm/v1/repo/index.yaml, but it doesn't list the chart that I pushed.

What do I have to do to add my charts to the index.yaml, or should I use another URL?

Edit

I just realized that https://mycontainerregistry.azurecr.io/helm/v1/repo/index.yaml will show the charts pushed via az acr helm push commands. So maybe that URL is something else?

Actually, you can use the command helm repo add to add the Azure Container Registry as a repository to the helm, and then you can pull the charts from the ACR. And all the charts in the ACR named myacr.azurecr.io/helm/chartname and it means you will pull the charts from the ACR. The name decides where the chart pulls from.

For example, you add a repo with the command here:

helm repo add technosophos https://technosophos.github.io/tscharts

and you can show the repo like this:

then you can pull charts from this repo:

You can do the things like this with ACR. And helm will help you update the index of the repo. You don't need to do it yourself.