add helm air gap notes

Author: paigecalvert

docs/vendor/replicated-onboarding.mdx

@@ -438,9 +438,11 @@ To support and test Helm installations:
 
 ### Add Support for Air Gap Installations
 
-KOTS and Embedded Cluster support installations in _air gap_ environments with no outbound internet access. Users can install in air gap environments by providing air gap bundles that contain the required images for the installers and for your application.
+Replicated Embedded Cluster and KOTS support installations in _air gap_ environments with no outbound internet access. Users can install with Embedded Cluster and KOTS in air gap environments by providing air gap bundles that contain the required images for the installers and for your application.
 
-You can use the Vendor Portal to build and download the air gap bundles needed to install in an air gap existing cluster with KOTS or in an air gap VM or bare metal server with Embedded Cluster.
+:::note
+Replicated also offers Alpha support for air gap installations with Helm. If you are interested in trying Helm air gap installations and providing feedback, please reach out to your account rep to enable this feature.
+:::
 
 To add support for air gap installations:
 
@@ -476,6 +478,12 @@ To add support for air gap installations:
 
 1. (Optional) Download the `.airgap` bundle for the release and the air gap bundle for the KOTS Admin Console. You can also download both bundles from the Download Portal for the target customer. Then, install in an air gap existing cluster to test. See [Air Gap Installation in Existing Clusters](/enterprise/installing-existing-cluster-airgapped).
 
+1. (Optional) Follow the steps in [Installing and Updating with Helm in Air Gap Environments (Alpha)](/vendor/helm-install-airgap) to test air gap installation with Helm. 
+
+    :::note
+    Air gap Helm installations are an Alpha feature. If you are interested in trying Helm air gap installations and providing feedback, please reach out to your account rep to enable this feature.
+    :::
+
 ### Add Roles for Multi-Node Clusters in Embedded Cluster Installations
 
 The Embedded Cluster Config supports roles for multi-node clusters. One or more roles can be selected and assigned to a node when it is joined to the cluster. Node roles can be used to determine which nodes run the Kubernetes control plane, and to assign application workloads to particular nodes.