Edit File: excerpt-gallery.php
<?php /** * Show the appropriate content for the Gallery post format. * * @link https://developer.wordpress.org/themes/basics/template-hierarchy/ * * @package WordPress * @subpackage Twenty_Twenty_One * @since Twenty Twenty-One 1.0 */ // Print the 1st gallery found. if ( has_block( 'core/gallery', get_the_content() ) ) { twenty_twenty_one_print_first_instance_of_block( 'core/gallery', get_the_content() ); } the_excerpt();