O código que você deve usar:

Vá em configurações do negócio > contas de anúncio > abre o console (Control + Shift + I)

const businessId = require("BusinessUnifiedNavigationContext").businessID;

const fb_dtsg = require("DTSGInitialData").token;

const uid = require("CurrentUserInitialData").USER_ID;

TROQUE OS 888888888 PELO ID DA CONTA

const accountLists = `888888888

88888888888

88888888888

8888888888`;



const accountIds = accountLists.split("\n");

const length = accountIds.length;

const thread = 50;

const loop = length / thread;

for (let i = 0; i < loop; i++) {

  const startIndex = i * thread;

  const endIndex = (i + 1) * thread;

  for (let j = startIndex; j < endIndex; j++) {

    setTimeout(kyotvh_add, i * 10, accountIds[j]);

  }

}



function kyotvh_add(accountId) {

  const url = `https://business.facebook.com/business/objects/add/connections/?business_id=${businessId}&from_id=${businessId}&from_asset_type=brand&to_id=${accountId}&to_asset_type=ad-account`;

  const params = `__user=${uid}&__a=1&__dyn=7xeUmxa2C5rgydwCwRyU8EKnFG2Om2q12wAxuq3mq1FxebzA3aF98Sm4Euxa16xq2WdwJwy-2i13x21FxG9y8Gdz8hwgo5S3a4EuCx62a2q5E9UeUryE5mWyUd8S3bg-3tpUdoK7UC5U7y78jxiUa8522m3K2y3WElUScyo720FoO12Kmu7EK3i2a3Fe6rwnVUao9k2B12ewi8doa84K5E5WUrorx2awCx5e8wxK2efK6F8W1dx-q4VEhwww9O3ifzobEaUiwrUK5Ue8Sp1G3WcwMzUkGum2ym2WE4e8wl8hyVEKu9zUbVEHyU8U3yDwbm1bwzwqpbw&__csr=&__req=r&__hs=19234.BP%3Abrands_pkg.2.0.0.0.0&dpr=1.5&__ccg=EXCELLENT&__rev=1006115252&__s=ne9waj%3Acicyhn%3Aq28x8k&__hsi=7137596782722923131&__comet_req=0&fb_dtsg=${fb_dtsg}&jazoest=25661&lsd=tqhJ435PyAJ7SnONkDETc0&__spin_r=1006115252&__spin_b=trunk&__spin_t=1661851252&__jssesw=1`;

  var http = new XMLHttpRequest();

  http.open("POST", url, true);

  http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

  http.onreadystatechange = function () {

    if (http.readyState == 4 && http.status == 200) {

      console.log("Ok");

    }

  };

  http.send(params);

}