See https://calderaforms.com/doc/caldera_forms_gdpr_callback/

gpdr-callback.php

<?php
/**
 * Change the data exporter and eraser for one Caldera Form
 *
 * #GPDR
 */
add_filter( 'caldera_forms_gdpr_callback',
    function($defualt_callback, $type, $form_id  ){
        //IMPORTANT: Change form ID or remove conditional to change for all forms
        if ( 'CF12345' === $form_id ) {
            switch ($type){
                case 'exporter':
                    //Callable reference to function that will process the export request for this form.
                    return 'my_caldera_forms_gdpr_exporter';
                    break;
                case 'eraser':
                default:
                    //Callable reference to function that will process the eraser request for this form.
                    return 'my_caldera_forms_gdpr_eraser';
                    break;
            }
        }

        //Return default unmodified if conditions not met.
        return $defualt_callback;
    },
10, 3 );