[simulation] use 128 max children for simulation (#7620)
diff --git a/examples/platforms/simulation/openthread-core-simulation-config.h b/examples/platforms/simulation/openthread-core-simulation-config.h
index 6657131..879f069 100644
--- a/examples/platforms/simulation/openthread-core-simulation-config.h
+++ b/examples/platforms/simulation/openthread-core-simulation-config.h
@@ -200,6 +200,16 @@
#endif
/**
+ * @def OPENTHREAD_CONFIG_MLE_MAX_CHILDREN
+ *
+ * The maximum number of children.
+ *
+ */
+#ifndef OPENTHREAD_CONFIG_MLE_MAX_CHILDREN
+#define OPENTHREAD_CONFIG_MLE_MAX_CHILDREN 128
+#endif
+
+/**
* @def OPENTHREAD_CONFIG_MLE_INFORM_PREVIOUS_PARENT_ON_REATTACH
*
* Define as 1 for a child to inform its previous parent when it attaches to a new parent.
