Next.js return the 404 error page in getInitialProps

Next v10 allows to return 404 page (not with props, but just plain as it is below)

  if (!checkItem) {
    return {
      notFound: true
    }
  }

Full code that works for me: ✅✅✅

export const getServerSideProps = wrapper.getServerSideProps(async ({ req, res, locale, query, store }) => {
  const { productId, categoryId } = query
   
  const checkItem = await getProductBySlugSSR(productId, categoryId, store)

  if (!checkItem) {
    return { // <-----------------does the trick here!!
      notFound: true
    }
  }
    
  return {
    props: {
      ...await serverSideTranslations(locale, ['common']),
    }
  }
})

Documentation: https://nextjs.org/blog/next-10#notfound-support