Index: wp-content/themes/twentytwentyone/assets/css/style-editor.css
===================================================================
--- wp-content/themes/twentytwentyone/assets/css/style-editor.css	(revision 56614)
+++ wp-content/themes/twentytwentyone/assets/css/style-editor.css	(working copy)
@@ -2599,3 +2599,6 @@
 .has-red-to-purple-gradient-background {
 	background: linear-gradient(160deg, var(--global--color-red), var(--global--color-purple));
 }
+.wp-block-list [data-block] {
+	margin: 0;
+}
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