diff -r 48c4eec2b7e6 -r 8c2e4d02f4ef wp/wp-includes/blocks/gallery/block.json
--- a/wp/wp-includes/blocks/gallery/block.json	Fri Sep 05 18:40:08 2025 +0200
+++ b/wp/wp-includes/blocks/gallery/block.json	Fri Sep 05 18:52:52 2025 +0200
@@ -112,6 +112,16 @@
 	"supports": {
 		"anchor": true,
 		"align": true,
+		"__experimentalBorder": {
+			"radius": true,
+			"color": true,
+			"width": true,
+			"style": true,
+			"__experimentalDefaultControls": {
+				"color": true,
+				"radius": true
+			}
+		},
 		"html": false,
 		"units": [ "px", "em", "rem", "vh", "vw" ],
 		"spacing": {