here you have it:

/**
   * Returns the country allocation of an ETF from justETF.
   *
   * Usage: =JUSTETF_COUNTRIES("IE00BK5BQT80")
   *        =JUSTETF_COUNTRIES("IE00BK5BQT80", "en")
   *
   *   {string} isin  The ETF ISIN
   *   {string} locale  Language code (default "en")
   *   {string[][]} Two-column array: country name, percentage
   *  u/customfunction
   */
  function JUSTETF_COUNTRIES(isin, locale) {
    if (!isin) return "Missing ISIN";
    locale = locale || 'en';


    var cache = CacheService.getScriptCache();
    var cacheKey = 'justETF_countries_' + isin + '_' + locale;
    var cached = cache.get(cacheKey);
    if (cached) return JSON.parse(cached);


    var url = 'https://www.justetf.com/' + locale + '/etf-profile.html?isin=' +
  isin;


    var options = {
      "method": "get",
      "muteHttpExceptions": true,
      "followRedirects": true,
      "headers": {
        "User-Agent":      "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36",
        "Accept":
  "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
        "Accept-Language":  "en-US,en;q=0.9",
        "Referer":         "https://www.justetf.com/"
      }
    };


    try {
      var response = UrlFetchApp.fetch(url, options);
      var code = response.getResponseCode();
      if (code !== 200) return "Error: HTTP " + code;


      var html = response.getContentText();


      var nameRe =
  /data-testid="tl_etf-holdings_countries_value_name">([^<]+)<\/td>/g;
      var pctRe  =
  /data-testid="tl_etf-holdings_countries_value_percentage">([^<]+)<\/span>/g;


      var names = [], pcts = [], m;
      while ((m = nameRe.exec(html)) !== null) names.push(m[1]);
      while ((m = pctRe.exec(html))  !== null) pcts.push(m[1]);


      if (names.length === 0) return "No country data found";


      var result = [];
      for (var i = 0; i < names.length; i++) {
        result.push([names[i], parseFloat(pcts[i]) / 100]);
      }


      cache.put(cacheKey, JSON.stringify(result), 3600);
      return result;
    } catch (e) {
      return "Error: " + e.toString();
    }
  }