/resources/asset.proto 

--- v21/resources/asset.proto   2026-06-19 01:00:44.000000000 +0000
+++ v22/resources/asset.proto   2026-06-19 01:00:46.000000000 +0000
@@ -97,6 +98,10 @@
   repeated AssetFieldTypePolicySummary field_type_policy_summaries = 40
       [(google.api.field_behavior) = OUTPUT_ONLY];

+  // Synthetic content info for the asset.
+  google.ads.googleads.v22.common.SyntheticContentInfo synthetic_content_info =
+      55;
+
   // The specific type of the asset.
   oneof asset_data {
     // Immutable. A YouTube video asset.