diff --git a/rmw_iceoryx_cpp/src/rmw_count.cpp b/rmw_iceoryx_cpp/src/rmw_count.cpp
index 9c87cd2..3b6ba54 100644
--- a/rmw_iceoryx_cpp/src/rmw_count.cpp
+++ b/rmw_iceoryx_cpp/src/rmw_count.cpp
@@ -142,4 +142,46 @@ rmw_publisher_count_matched_subscriptions(
   *subscription_count = counter;
   return RMW_RET_OK;
 }
+
+rmw_ret_t
+rmw_count_clients(
+  const rmw_node_t * node,
+  const char * service_name,
+  size_t * count)
+{
+  RCUTILS_CHECK_ARGUMENT_FOR_NULL(node, RMW_RET_ERROR);
+  RCUTILS_CHECK_ARGUMENT_FOR_NULL(service_name, RMW_RET_ERROR);
+  RCUTILS_CHECK_ARGUMENT_FOR_NULL(count, RMW_RET_ERROR);
+
+  RMW_CHECK_TYPE_IDENTIFIERS_MATCH(
+    rmw_count_clients
+    : node, node->implementation_identifier,
+    rmw_get_implementation_identifier(), return RMW_RET_ERROR);
+
+  // Iceoryx introspection does not support client/server counting
+  // See: https://github.com/eclipse-iceoryx/iceoryx/issues/1128
+  *count = 0;
+  return RMW_RET_UNSUPPORTED;
+}
+
+rmw_ret_t
+rmw_count_services(
+  const rmw_node_t * node,
+  const char * service_name,
+  size_t * count)
+{
+  RCUTILS_CHECK_ARGUMENT_FOR_NULL(node, RMW_RET_ERROR);
+  RCUTILS_CHECK_ARGUMENT_FOR_NULL(service_name, RMW_RET_ERROR);
+  RCUTILS_CHECK_ARGUMENT_FOR_NULL(count, RMW_RET_ERROR);
+
+  RMW_CHECK_TYPE_IDENTIFIERS_MATCH(
+    rmw_count_services
+    : node, node->implementation_identifier,
+    rmw_get_implementation_identifier(), return RMW_RET_ERROR);
+
+  // Iceoryx introspection does not support client/server counting
+  // See: https://github.com/eclipse-iceoryx/iceoryx/issues/1128
+  *count = 0;
+  return RMW_RET_UNSUPPORTED;
+}
 }  // extern "C"
diff --git a/rmw_iceoryx_cpp/src/rmw_event.cpp b/rmw_iceoryx_cpp/src/rmw_event.cpp
index d16c565..4e94a44 100644
--- a/rmw_iceoryx_cpp/src/rmw_event.cpp
+++ b/rmw_iceoryx_cpp/src/rmw_event.cpp
@@ -59,4 +59,11 @@ rmw_ret_t rmw_event_set_callback(
 
   return RMW_RET_UNSUPPORTED;
 }
+
+bool
+rmw_event_type_is_supported(rmw_event_type_t event_type)
+{
+  (void) event_type;
+  return false;
+}
 }  // extern "C"