Example code for caldera_forms_admin_csv filter See: https://calderaforms.com/doc/caldera_forms_admin_csv/

caldera_forms_admin_csv.php

<?php
/**
 * Add extra column to Caldera Forms admin CSV export
 *
 * In this example, a unique ID column.
 */
add_filter( 'caldera_forms_admin_csv', function( $csv_data, $form ){

	//IMPORTANT change form ID to match your form
	if( 'cf123456' === $form[ 'ID' ] ){
		//Add a header for new column
		$csv_data[ 'headers' ][ 'unique_id' ] = 'Unique ID';
		//Add a value for each row for this new column
		//note that "unique_id" index matches in data and headers - you can call it whatever you want, just be consistent
		foreach ( $csv_data[ 'data' ] as $i => $row ) {
			$row[ 'unique_id' ] = uniqid( 'prefix' );
		}

	}

	return $csv_data;
	
}, 10, 2 );