Configuring dedicated workload profiles with container app dynamic session pools

The documentation for Container Apps Dynamic Sessions product (in beta) says that it only works with an container app environment configured with a dedicated workflow profile. However, when I create a workflow profile in an environment, I can't seem to create a session pool using that workload profile.

Here you can see that my env, testenv3 does have a dedicated workload profile with 1 D4 instance.

$ az containerapp env show -n testenv3 -g <rg>

{
...
"workloadProfiles": [
      {
        "name": "Consumption",
        "workloadProfileType": "Consumption"
      },
      {
        "maximumCount": 1,
        "minimumCount": 1,
        "name": "e4-profile",
        "workloadProfileType": "D4"
      }
    ],
...
}

When I try to create a session with the following, the operation always seems to be "InProgress" in the JSON in the Portal. I think this is because it doesn't know which nodes to run the pod on. How can I configure the workload profile when creating a session pool? There doesn't seem to be an option in az containerapp sessionpool create to do this.

$ az containerapp sessionpool create --name fifth-pool --resource-group 
<rg> --environment testenv3 --location westus2 --registry-server <registry> --registry-username sbappregistry --registry-password <password> --container-type CustomContainer --image <image> --cpu 0.25 --memory 0.5Gi  --network-status EgressDisabled --max-sessions 1 --ready-sessions 0 

Furthermore, where can I go in the Portal to view the node that is up in this e4-profile

workflow? It seems like there used to be a tab for that in the environment page, but it has been removed. See the screenshot embedded in this post.

I'm creating it with 0 ready sessions as you can see above. Do I need to, perhaps, create it with 1 ready session for things to work? Will that get me out of the InProgress state?

Note that I have followed the tutorial here, but I can't seem to get it to work.

Thank you.