Ticket #58887: 58887.diff

src/wp-includes/post.php

@@ -307 +307 @@
                         '_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
                         'show_ui'               => true,
                         'show_in_menu'          => false,
+                        'show_in_admin_bar'     => true,
                         'rewrite'               => false,
                         'show_in_rest'          => true,
                         'rest_base'             => 'blocks',