Woocommerce and php guru to help create array from woocommerce order object to be used to connect to external api

All the woocommerce item meta is already done and being added to the order via checkout.

// Get order item meta.
$order = wc_get_order( $order_id );

// Get transaction id.
$transaction = $order->get_transaction_id();
// Get more order meta values

// Get via loop order item meta
foreach ( $order->get_items() as $itemId => $item ) {

// Product id.
$productId = $item->get_product_id();

// Product quantity.
$productQt = $item->get_quantity();

// with product id connect to api to get api product data. I have this working and I get 1 array json_encoded [{"Product":"api_id","value1":"1","value2":"2","quantity":"0"}]
$apiproduct = $api_result;
$apiproduct_decoded = json_decode( $apiproduct, true );
$remove_first_array = $apiproduct_decoded[0];
$product_Value1 = $is_product_controller[0]['value1'];
$product_Value2 = $is_product_controller[0]['value2'];
// Now I need to multiply array value 1 and value 2 by the woocommerce product quantity. These values are going to be used later to connect to api and send data.
$sum_value1 = $product_Value1 * $productQt;
$sum_value2 = $product_Value2 * $productQt;
// Now I need to rebuild original api result array with woocommerce quantity
$remove_first_array_change = array_replace($remove_first_array, ['Quantity' => $productQt]);
$rebuild_api_array = $remove_first_array_change;

// Get gift, returns true or false
$gift = wc_get_order_item_meta( $itemId, '_resource', gift );

// Get resource id from woocommerce. With the resource id
$resource = wc_get_order_item_meta( $itemId, '_resource', true );

}

All of the above is done and working. I need help with the last part.
To connect to the external api I need to make a loop one per unique woocommerce item meta $resource with a constructed body.
If I have 3 woocommerce products with the same $resource I need to combine all values. Maybe do this outside the final foreach?

foreach ( $resource as $uniqueresource ) {
// There's another value that comes from the external api the $resource_data. We need to get this value to include in the body for the last call and is based on the unique $resource.
// Since the loop is based on unique $resource I only need to get this value once per different $resource.... We are looping the $resource.
// I already have this call working.

$body = array(
'resource_data' => $resource_data,
'products' => array($rebuild_api_array, $rebuild_api_array, $rebuild_api_array,etc), like this [{"Product":"123","value1":"1","value2":"0","quantity":"7"},{"Product":"456","value1":"2","value2":"1","quantity":"2"},{"Product":"999","value1":"1","value2":"4","quantity":"6"} etc. last array can not have ending seperator coma or api returns error]
'sum_value1' => should be the sum of all $sum_value1,
'sum_value2' => should be the sum of all $sum_value2,
'gift' => if 1 resource $gift returns true then this setting is immediately true for all identical $resource,
);
// connect to api via POST
}