Helpful...
Took a little while to find the filter. Do you have any documentation on them if I need to find another in the future?
For anyone else, I just did this...
add_filter( 'atum/orders/item_product/save_data', 'add_product_price_to_line_item', 10, 2 );
function add_product_price_to_line_item( $save_values, $item ) {
$product_id = isset( $save_values['_product_id'] ) ? $save_values['_product_id'] : 0;
if ( $product_id ) {
$product = wc_get_product( $product_id );
if ( $product ) {
$save_values['_product_price'] = $product->get_price();
}
}
return $save_values;
}