Index: src/wp-content/themes/twentytwentytwo/style.css
===================================================================
--- src/wp-content/themes/twentytwentytwo/style.css	(revision 56000)
+++ src/wp-content/themes/twentytwentytwo/style.css	(working copy)
@@ -156,6 +156,6 @@
 	margin-bottom: 1rem;
 }
 
-.wp-block-post-comments ol.commentlist ul.children li:not(:last-child) {
+.wp-block-post-comments ol.commentlist li.comment:not(:last-child) {
 	margin-bottom: 1rem;
 }