Allow replace operation on empty default block in Zoom Out (WordPress…

…#68026)

* Allow replace operation on empty default block in Zoom Out

* Remove operation type from conditional check

Co-authored-by: getdave <get_dave@git.wordpress.org>
Co-authored-by: draganescu <andraganescu@git.wordpress.org>

packages/block-editor/src/components/use-block-drop-zone/index.js

@@ -456,7 +456,14 @@ export default function useBlockDropZone( {
 				const [ targetIndex, operation, nearestSide ] =
 					dropTargetPosition;
 
-				if ( isZoomOut() && operation !== 'insert' ) {
+				const isTargetIndexEmptyDefaultBlock =
+					blocksData[ targetIndex ]?.isUnmodifiedDefaultBlock;
+
+				if (
+					isZoomOut() &&
+					! isTargetIndexEmptyDefaultBlock &&
+					operation !== 'insert'
+				) {
 					return;
 				}