diff --git a/mmv1/products/identityplatform/Config.yaml b/mmv1/products/identityplatform/Config.yaml
index 97bfb4f98354..1a8ed31bceac 100644
--- a/mmv1/products/identityplatform/Config.yaml
+++ b/mmv1/products/identityplatform/Config.yaml
@@ -233,6 +233,7 @@ properties:
     name: 'smsRegionConfig'
     description: |
       Configures the regions where users are allowed to send verification SMS for the project or tenant. This is based on the calling code of the destination phone number.
+    default_from_api: true
     properties:
       - !ruby/object:Api::Type::NestedObject
         name: 'allowByDefault'