Hi Ariel, 

Thank you for contacting WPClever Support Forum. 

We’ve received your ticket and assigned one of our developers to help you with that. 

He’ll be looking into your question and responding with specific instructions as soon as possible. Please stay in touch as he might need discuss further with you. 

Best regards.

Hi Ariel,

Please try this plugin https://wordpress.org/plugins/woocommerce-pdf-invoices-packing-slips/

Then add below code to current theme (or child-theme) / functions.php

add_filter( 'wpo_wcpdf_order_items_data', 'woosb_wcpdf_order_items_data' );
function woosb_wcpdf_order_items_data( $data_list ) {
    foreach ( $data_list as $key => $data ) {
        $bundles = wc_get_order_item_meta( $data['item_id'], '_woosb_ids', true );
        $bundled = wc_get_order_item_meta( $data['item_id'], '_woosb_parent_id', true );
        if ( ! empty( $bundles ) ) {
            // hide bundles
            //unset( $data_list[ $key ] );
        }
        if ( ! empty( $bundled ) ) {
            // hide bundled
            unset( $data_list[ $key ] );
        }
    }
    return $data_list;
}

If you use another PDF Invoice plugin, please send me this plugin then I can check and provide the code.

Please use below code instead:

// invoice
add_filter( 'wf_pklist_alter_order_items', 'woosb_wf_pklist_alter_order_items', 99, 1 );
function woosb_wf_pklist_alter_order_items( $order_items ) {
    foreach ( $order_items as $order_item_id => $order_item ) {
        if ( $order_item->meta_exists( '_woosb_parent_id' ) ) {
            unset( $order_items[ $order_item_id ] );
        }
    }
    return $order_items;
}
// package
add_filter( 'wf_pklist_alter_package_order_items', 'woosb_wf_pklist_alter_package_order_items', 99, 1 );
function woosb_wf_pklist_alter_package_order_items( $order_package ) {
    foreach ( $order_package as $order_package_key => $order_package_item ) {
        if ( isset( $order_package_item['extra_meta_details'], $order_package_item['extra_meta_details']['_woosb_parent_id'] ) ) {
            unset( $order_package[ $order_package_key ] );
        }
    }
    return $order_package;
}
// meta data
add_filter( 'wf_pklist_modify_meta_data', 'woosb_wf_pklist_modify_meta_data', 99, 1 );
function woosb_wf_pklist_modify_meta_data( $meta_data ) {
    if ( array_key_exists( '_woosb_ids', $meta_data ) || array_key_exists( '_woosb_parent_id', $meta_data ) ) {
        $meta_data = array();
    }
    return $meta_data;
}

Please add this code to the end of current theme (or child-theme) / functions.php

You're welcome!

If you are satisfied with our plugin and support, please reward it with a full five-star ★★★★★ rating.
https://wordpress.org/support/plugin/woo-product-bundle/reviews?rate=5#new-post 
Thank you in advance! <3