diff --git a/components/doc/common/apidoc/index.json b/components/doc/common/apidoc/index.json
index f0d4a44314..6316dee978 100644
--- a/components/doc/common/apidoc/index.json
+++ b/components/doc/common/apidoc/index.json
@@ -46777,9 +46777,9 @@
                             "name": "severity",
                             "optional": true,
                             "readonly": false,
-                            "type": "\"success\" | \"warning\" | \"secondary\" | \"info\" | \"danger\" | \"contrast\"",
+                            "type": "\"success\" | \"help\" | \"warning\" | \"secondary\" | \"info\" | \"danger\" | \"contrast\"",
                             "default": "",
-                            "description": "Defines the style of the button, valid values are \"secondary\", \"success\", \"info\", \"warning\", \"danger\", \"contrast\"."
+                            "description": "Defines the style of the button, valid values are \"secondary\", \"success\", \"info\", \"warning\", \"danger\", \"contrast\", \"help\"."
                         },
                         {
                             "name": "size",
diff --git a/components/lib/splitbutton/splitbutton.d.ts b/components/lib/splitbutton/splitbutton.d.ts
index a3d7e780f2..330c60bd7a 100644
--- a/components/lib/splitbutton/splitbutton.d.ts
+++ b/components/lib/splitbutton/splitbutton.d.ts
@@ -127,9 +127,9 @@ export interface SplitButtonProps extends Omit<React.DetailedHTMLProps<React.HTM
      */
     outlined?: boolean | undefined;
     /**
-     * Defines the style of the button, valid values are "secondary", "success", "info", "warning", "danger", "contrast".
+     * Defines the style of the button, valid values are "secondary", "success", "info", "warning", "danger", "contrast", "help".
      */
-    severity?: 'secondary' | 'success' | 'info' | 'warning' | 'danger' | 'contrast' | undefined;
+    severity?: 'secondary' | 'success' | 'info' | 'warning' | 'danger' | 'contrast' | 'help' | undefined;
     /**
      * Defines the size of the button, valid values are "small" and "large".
      */
diff --git a/components/lib/tree/UITreeNode.js b/components/lib/tree/UITreeNode.js
index d170a809ad..a0b62908dd 100644
--- a/components/lib/tree/UITreeNode.js
+++ b/components/lib/tree/UITreeNode.js
@@ -788,7 +788,7 @@ export const UITreeNode = React.memo((props) => {
                 type: 'button',
                 className: cx('toggler'),
                 tabIndex: -1,
-                'aria-hidden': true,
+                'aria-hidden': false,
                 onClick: onTogglerClick
             },
             getPTOptions('toggler')