I want to ask you is that immuteable or not ?

  // Select all product options that you selected for each product we store it in an array
  const [selectedProductOptions, setSelectedProductOptions] = useState<ISizeAndColors[] | []>([]);

    findObj && setSelectedProductOptions(prev => {
      return prev.map((el => {
        if(el.product_id === currentProductID) {
          return {
            ...el,
            color,
            size,
            amount
          }
        } else {
          return {
            ...el
          }
        }
      }))

If not what I am doing then wrong ?