Customize the image for taxonomy term results

searchwp-customizations.php

<?php

add_filter( 'searchwp\results\entry\data', function( $data, $result ) {
    // Check if the result is a taxonomy term.
    if ( $result instanceof \WP_Term ) {
        // Replace default image HTML with a placeholder.
        $data['image_html'] = '<img src="http://place-hold.it/500x500" />';
    }

    return $data;

}, 20, 2 );