adding sortConfig

src/app/collection-page/collection-page.component.ts

@@ -77,7 +77,8 @@ export class CollectionPageComponent implements OnInit {
       currentPage: 1,
       pageSize: this.appConfig.browseBy.pageSize,
     });
-
+    
+    this.sortConfig = new SortOptions('dc.date.accessioned', SortDirection.DESC);
   }
 
   ngOnInit(): void {