Use Component.onCompleted

as we don't yet depends on KF 6.10

src/qml/QuickSwitcher.qml

@@ -27,7 +27,8 @@ Kirigami.SearchDialog {
     onTextChanged: RoomManager.sortFilterRoomListModel.filterText = text
     model: RoomManager.sortFilterRoomListModel
     emptyText: i18nc("Placeholder message", "No room found")
-    emptyHelpfulAction: Kirigami.Action {
+    Kirigami.Action {
+        id: exploreRoomAction
         text: i18nc("@action:button", "Explore rooms")
         icon.name: "compass"
         onTriggered: {
@@ -43,6 +44,8 @@ Kirigami.SearchDialog {
         }
     }
 
+    Component.onCompleted: emptyHelpfulAction = exploreRoomAction
+
     parent: QQC2.Overlay.overlay
 
     delegate: RoomDelegate {