first

wp-content/themes/twentytwentyone/template-parts/excerpt/excerpt-chat.php

@@ -0,0 +1,20 @@
+<?php
+/**
+ * Show the appropriate content for the Chat post format.
+ *
+ * @link https://developer.wordpress.org/themes/basics/template-hierarchy/
+ *
+ * @package WordPress
+ * @subpackage Twenty_Twenty_One
+ * @since Twenty Twenty-One 1.0
+ */
+
+// If there are paragraph blocks, print up to two.
+// Otherwise this is legacy content, so print the excerpt.
+if ( has_block( 'core/paragraph', get_the_content() ) ) {
+
+	twenty_twenty_one_print_first_instance_of_block( 'core/paragraph', get_the_content(), 2 );
+} else {
+
+	the_excerpt();
+}