functions.php

<?php

/**
 * Display Posts, add support for id="current"
 * @see https://displayposts.com/2019/04/24/display-current-post/
 *
 */
function be_dps_current_post( $args, $atts ) {
	if( !empty( $atts['id'] ) && 'current' == $atts['id'] )
 		$args['post__in'] = array( get_the_ID() );
	return $args;
}
add_filter( 'display_posts_shortcode_args', 'be_dps_current_post', 10, 2 );