/enums/asset_type.proto 

--- v18/enums/asset_type.proto  2025-08-05 14:36:10.000000000 +0000
+++ v19/enums/asset_type.proto  2025-08-05 14:36:18.000000000 +0000
@@ -117,5 +117,11 @@

     // Demand Gen Carousel Card asset.
     DEMAND_GEN_CAROUSEL_CARD = 29;
+
+    // Business message asset.
+    BUSINESS_MESSAGE = 30;
+
+    // App deep link asset.
+    APP_DEEP_LINK = 31;
   }
 }