JSFiddle - React, Tailwind, and code Playground

JavaScript

var obj = [
  {
    "product_option_id":"229",
    "product_option_value":
    [
      {
        "product_option_value_id":"21",
        "option_value_id":"51",
        "price":"1,22 €",
        "price_prefix":"+"
      },
      {
        "product_option_value_id":"22",
        "option_value_id":"52",
        "price":false,
        "price_prefix":"+"
      },
      {
        "product_option_value_id":"23",
        "option_value_id":"53",
        "price":"2,42 €",
        "price_prefix":"+"
      }
    ],
    "option_id":"14",
    "type":"radio",
    "value":""
  },
  {
    "product_option_id":"228",
    "product_option_value":
    [
      {
        "product_option_value_id":"19",
        "option_value_id":"49",
        "price":"1,22 €",
        "price_prefix":"+"
      },
      {
        "product_option_value_id":"20",
        "option_value_id":"50",
        "price":"2,42 €",
        "price_prefix":"+"
      }
    ],
    "option_id":"13",
    "type":"select",
    "value":""
  }
];

for (var i = 0; i < obj.length; i++)
{
    var item = obj[i];
    if (item.product_option_id === "228")
    {
        for (var j = 0; j < item.product_option_value.length; j++)
        {
            var productItem = item.product_option_value[j];
            if (productItem.product_option_value_id === "19")
            {
                alert(productItem.price_prefix + " " + productItem.price);
            }
        }
    }
}