/resources/recommendation.proto 

--- v18/resources/recommendation.proto  2025-08-05 14:36:06.000000000 +0000
+++ v19/resources/recommendation.proto  2025-08-05 14:36:20.000000000 +0000
@@ -537,6 +537,10 @@
   message ImprovePerformanceMaxAdStrengthRecommendation {
     // Output only. The asset group resource name.
     string asset_group = 1 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+    // Output only. The current ad strength score of the asset group.
+    google.ads.googleads.v19.enums.AdStrengthEnum.AdStrength ad_strength = 2
+        [(google.api.field_behavior) = OUTPUT_ONLY];
   }

   // The Dynamic Search Ads to Performance Max migration recommendation.