Use own-property check for supported subentry type

src/panels/config/integrations/ha-config-integration-page.ts

@@ -1338,7 +1338,14 @@ class HaConfigIntegrationPage extends SubscribeMixin(LitElement) {
     const configEntries = this._domainConfigEntries(
       this.domain,
       this._extraConfigEntries || this.configEntries
-    ).filter((entry) => entry.source !== "ignore");
+    ).filter(
+      (entry) =>
+        entry.source !== "ignore" &&
+        Object.prototype.hasOwnProperty.call(
+          entry.supported_subentry_types,
+          flowType
+        )
+    );
 
     if (!configEntries.length) {
       return;