diff --git a/scripting/scripting.cpp b/scripting/scripting.cpp
--- a/scripting/scripting.cpp
+++ b/scripting/scripting.cpp
@@ -709,6 +709,7 @@
     qmlRegisterType<KWin::ScriptingClientModel::SimpleClientModel>("org.kde.kwin", 2, 0, "ClientModel");
     qmlRegisterType<KWin::ScriptingClientModel::ClientModelByScreen>("org.kde.kwin", 2, 0, "ClientModelByScreen");
     qmlRegisterType<KWin::ScriptingClientModel::ClientModelByScreenAndDesktop>("org.kde.kwin", 2, 0, "ClientModelByScreenAndDesktop");
+    qmlRegisterType<KWin::ScriptingClientModel::ClientModelByScreenAndActivity>("org.kde.kwin", 2, 1, "ClientModelByScreenAndActivity");
     qmlRegisterType<KWin::ScriptingClientModel::ClientFilterModel>("org.kde.kwin", 2, 0, "ClientFilterModel");
     qmlRegisterType<KWin::AbstractClient>();
     qmlRegisterType<KWin::X11Client>();
diff --git a/scripting/scripting_model.h b/scripting/scripting_model.h
--- a/scripting/scripting_model.h
+++ b/scripting/scripting_model.h
@@ -268,6 +268,14 @@
     ~ClientModelByScreenAndDesktop() override;
 };
 
+class ClientModelByScreenAndActivity : public ClientModel
+{
+    Q_OBJECT
+public:
+    ClientModelByScreenAndActivity(QObject *parent = nullptr);
+    ~ClientModelByScreenAndActivity() override;
+};
+
 /**
  * @brief Custom QSortFilterProxyModel to filter on Client caption, role and class.
  */
diff --git a/scripting/scripting_model.cpp b/scripting/scripting_model.cpp
--- a/scripting/scripting_model.cpp
+++ b/scripting/scripting_model.cpp
@@ -847,6 +847,7 @@
 CLIENT_MODEL_WRAPPER(SimpleClientModel, QList<LevelRestriction>())
 CLIENT_MODEL_WRAPPER(ClientModelByScreen, QList<LevelRestriction>() << ScreenRestriction)
 CLIENT_MODEL_WRAPPER(ClientModelByScreenAndDesktop, QList<LevelRestriction>() << ScreenRestriction << VirtualDesktopRestriction)
+CLIENT_MODEL_WRAPPER(ClientModelByScreenAndActivity, QList<LevelRestriction>() << ScreenRestriction << ActivityRestriction)
 #undef CLIENT_MODEL_WRAPPER
 
 ClientFilterModel::ClientFilterModel(QObject *parent)