Dominykas

// Update variable product regular price. Product ID: 34
$data = [
    'update' => [
        [
            'id' => 34,
            'regular_price' => '555'
        ]
    ]
];
print_r($woocommerce->post('products/batch', $data));

// Update product variation. Product ID: 34 , product variation ID: 13
$data = [
    'update' => [
        [
            'id' => 13,
            'regular_price' => '777'
        ]
    ]
];

print_r($woocommerce->post('products/34/variations/batch', $data));