diff --git a/packages/block-library/src/comment-content/block.json b/packages/block-library/src/comment-content/block.json
index 5979511eba9be..0c28c25f330ca 100644
--- a/packages/block-library/src/comment-content/block.json
+++ b/packages/block-library/src/comment-content/block.json
@@ -29,7 +29,11 @@
 			"__experimentalFontWeight": true,
 			"__experimentalFontStyle": true,
 			"__experimentalTextTransform": true,
-			"__experimentalLetterSpacing": true
+			"__experimentalTextDecoration": true,
+			"__experimentalLetterSpacing": true,
+			"__experimentalDefaultControls": {
+				"fontSize": true
+			}
 		},
 		"spacing": {
 			"padding": [ "horizontal", "vertical" ],