diff -r 48c4eec2b7e6 -r 8c2e4d02f4ef wp/wp-includes/class-wp-block-supports.php
--- a/wp/wp-includes/class-wp-block-supports.php	Fri Sep 05 18:40:08 2025 +0200
+++ b/wp/wp-includes/class-wp-block-supports.php	Fri Sep 05 18:52:52 2025 +0200
@@ -104,7 +104,7 @@
 		}
 
 		$block_attributes = array_key_exists( 'attrs', self::$block_to_render ) && is_array( self::$block_to_render['attrs'] )
-			? self::$block_to_render['attrs']
+			? $block_type->prepare_attributes_for_render( self::$block_to_render['attrs'] )
 			: array();
 
 		$output = array();
@@ -181,7 +181,7 @@
 
 	// This is hardcoded on purpose.
 	// We only support a fixed list of attributes.
-	$attributes_to_merge = array( 'style', 'class', 'id' );
+	$attributes_to_merge = array( 'style', 'class', 'id', 'aria-label' );
 	$attributes          = array();
 	foreach ( $attributes_to_merge as $attribute_name ) {
 		if ( empty( $new_attributes[ $attribute_name ] ) && empty( $extra_attributes[ $attribute_name ] ) ) {