JetEngine CPT admin callback download button for Media meta field (supports all value types)

jet_engine_custom_cb_download_button.php

<?php

add_filter( 'jet-engine/post-type/predifined-columns-cb-for-js', function( $callbacks ) {
    
    $callbacks['jet_engine_custom_cb_download_button'] = array(
        'description' => 'Download media file',
        'args'        => array(
            'media' => array(
                'label'       => __( 'Set field', 'jet-engine' ),
                'description' => __( 'Meta field to get media from', 'jet-engine' ),
                'value'       => '',
            ),
        ),
    );
    
    return $callbacks;
    
} );

function jet_engine_custom_cb_download_button( $post_id, $field ) {

	$attachment_id = get_post_meta( $post_id, $field, $single = true );
	
	if ( ! $attachment_id ) {
		
		return null;
		
	}
	
	$attachment_url = \Jet_Engine_Tools::get_attachment_image_data_array( $attachment_id, 'url' )['url'] ?? '#';
	
	$result = "<a href='" . esc_url( $attachment_url ) . "' download>Download</a>";
	
	return $result;
	
}