diff --git a/content/en/docs/concepts/services-networking/service.md b/content/en/docs/concepts/services-networking/service.md
index f4f82e71b0..24c1ef27be 100644
--- a/content/en/docs/concepts/services-networking/service.md
+++ b/content/en/docs/concepts/services-networking/service.md
@@ -203,10 +203,15 @@ described in detail in [EndpointSlices](/docs/concepts/services-networking/endpo
 
 ### Application protocol
 
-{{< feature-state for_k8s_version="v1.19" state="beta" >}}
+{{< feature-state for_k8s_version="v1.20" state="stable" >}}
 
-The `AppProtocol` field provides a way to specify an application protocol for each Service port.
-The value of this field is mirrored by corresponding Endpoints and EndpointSlice resources.
+The `appProtocol` field provides a way to specify an application protocol for
+each Service port. The value of this field is mirrored by the corresponding
+Endpoints and EndpointSlice objects.
+
+This field follows standard Kubernetes label syntax. Values should either be
+[IANA standard service names](http://www.iana.org/assignments/service-names) or
+domain prefixed names such as `mycompany.com/my-custom-protocol`.
 
 ## Virtual IPs and service proxies
 
diff --git a/content/en/docs/reference/command-line-tools-reference/feature-gates.md b/content/en/docs/reference/command-line-tools-reference/feature-gates.md
index 669c452e9c..ead350c0c0 100644
--- a/content/en/docs/reference/command-line-tools-reference/feature-gates.md
+++ b/content/en/docs/reference/command-line-tools-reference/feature-gates.md
@@ -151,8 +151,6 @@ different Kubernetes components.
 | `ServerSideApply` | `false` | Alpha | 1.14 | 1.15 |
 | `ServerSideApply` | `true` | Beta | 1.16 | |
 | `ServiceAccountIssuerDiscovery` | `false` | Alpha | 1.18 | |
-| `ServiceAppProtocol` | `false` | Alpha | 1.18 | 1.18 |
-| `ServiceAppProtocol` | `true` | Beta | 1.19 | |
 | `ServiceNodeExclusion` | `false` | Alpha | 1.8 | 1.18 |
 | `ServiceNodeExclusion` | `true` | Beta | 1.19 | |
 | `ServiceTopology` | `false` | Alpha | 1.17 | |
@@ -286,6 +284,9 @@ different Kubernetes components.
 | `SCTPSupport` | `false` | Alpha | 1.12 | 1.18 |
 | `SCTPSupport` | `true` | Beta | 1.19 | 1.19 |
 | `SCTPSupport` | `true` | GA | 1.20 | - |
+| `ServiceAppProtocol` | `false` | Alpha | 1.18 | 1.18 |
+| `ServiceAppProtocol` | `true` | Beta | 1.19 | |
+| `ServiceAppProtocol` | `true` | GA | 1.20 | - |
 | `ServiceLoadBalancerFinalizer` | `false` | Alpha | 1.15 | 1.15 |
 | `ServiceLoadBalancerFinalizer` | `true` | Beta | 1.16 | 1.16 |
 | `ServiceLoadBalancerFinalizer` | `true` | GA | 1.17 | - |