I did a fresh installation.
Hi 
   1) Have you check if openstack application is applied successfully via “system application-list" Command ?
  
Yes, OpenStack application is updated and applied.
 
$ system application-list
+--------------------------+-----------------------------+-----------------------------------+----------------------------------------+----------+-----------+
|
 application              | version                     | manifest name  
                   | manifest file                          | status   |
 progress  |
+--------------------------+-----------------------------+-----------------------------------+----------------------------------------+----------+-----------+
|
 cert-manager             | 1.0-6                       | 
cert-manager-manifest             | certmanager-manifest.yaml            
  | applied  | completed |
| nginx-ingress-controller | 1.0-0                       | nginx-ingress-controller-manifest | nginx_ingress_controller_manifest.yaml | applied  | completed |
|
 oidc-auth-apps           | 1.0-28                      | 
oidc-auth-manifest                | manifest.yaml                        
  | uploaded | completed |
| platform-integ-apps      | 1.0-10        
              | platform-integration-manifest     | manifest.yaml        
                  | applied  | completed |
| stx-openstack           
 | 1.0-49-centos-stable-latest | armada-manifest                   | 
stx-openstack.yaml                     | uploaded | completed |
+--------------------------+-----------------------------+-----------------------------------+----------------------------------------+----------+-----------+
 
   2) are you following [1] to configure helm endpoint domain?
 
I did not used speficic endpoint for helm.
I was able to generate a keystone token using the following command.
curl -i \
  -H "Content-Type: application/json" \
  -d '
{ "auth": {
    "identity": {
      "methods": ["password"],
      "password": {
        "user": {
          "name": "admin",
          "domain": { "id": "default" },
          "password": "XXXXXX"
        }
      }
    }
  }
}' \
  "
http://192.168.204.1:5000/v3/auth/tokens" ; echo
 
But could not retrieve nova flavors
I still can not access the Openstack dashboard.