Return all custom taxonomy terms for post in REST API v2? Currently limited to 10 terms

by

You can try this

/* 
* Increase the limit of posts per page in json
*/
add_filter( 'rest_your_collection_params', function ( $params, WP_Post_Type $post_type ) {
    if ( 'your_cpt' === $post_type->name && isset( $params['per_page'] ) ) {
        $params['per_page']['maximum'] = 99;
    }

    return $params;
}, 10, 2 );