Export Blocked Users from your FanPage: first switch your profile to your FanPage, then run the script on https://www.facebook.com/settings?tab=blocking

exportblockedusersfp.js

async function privateApiRequest2(body = null, headers = null, url = null) {
  let graphUrl = "";
  if (url != null) graphUrl = url;
  else {
    let subDomain = getSubDomain();
    graphUrl = `https://${subDomain}.facebook.com/api/graphql/`;
  }

  if (body == null) {
    let uid = require("CurrentUserInitialData").USER_ID;
    let dtsg = require("DTSGInitialData").token;
    let lsd = require("LSD").token;
    body = `__user=${uid}&__a=1&fb_dtsg=${dtsg}&lsd=${lsd}`;
  }

  headers = headers ?? {
    accept: "*/*",
    "accept-language": "ca-ES,ca;q=0.9,en-US;q=0.8,en;q=0.7",
    "content-type": "application/x-www-form-urlencoded",
    "sec-ch-ua":
      '"Not?A_Brand";v="8", "Chromium";v="108", "Google Chrome";v="108"',
    "sec-ch-ua-mobile": "?0",
    "sec-ch-ua-platform": '"Windows"',
    "sec-fetch-dest": "empty",
    "sec-fetch-mode": "cors",
    "sec-fetch-site": "same-origin",
    "x-fb-lsd": require("LSD").token,
  };

  let f = await fetch(graphUrl, {
    headers: headers,
    body: body,
    method: "POST",
    mode: "cors",
    credentials: "include",
  });
  let t = await f.text();
  if (t.startsWith("for (;;);")) t = t.substring(9);
  return JSON.parse(t);
}

async function privateApiRequest(variables, docId, url = null) {
  let graphUrl = "";
  if (url != null) graphUrl = url;
  else {
    let subDomain = getSubDomain();
    graphUrl = `https://${subDomain}.facebook.com/api/graphql/`;
  }
  let lsd = require("LSD").token;
  let dtsg = require("DTSGInitialData").token;
  let uid = require("CurrentUserInitialData").USER_ID;

  let body = {
    av: uid,
    __user: uid,
    __a: 1,
    fb_dtsg: dtsg,
    lsd: lsd,
    variables: JSON.stringify(variables),
    server_timestamps: true,
    doc_id: docId,
  };

  let headers = {
    accept: "*/*",
    "accept-language": "ca-ES,ca;q=0.9,en-US;q=0.8,en;q=0.7",
    "content-type": "application/x-www-form-urlencoded",
    "sec-ch-ua":
      '"Not?A_Brand";v="8", "Chromium";v="108", "Google Chrome";v="108"',
    "sec-ch-ua-mobile": "?0",
    "sec-ch-ua-platform": '"Windows"',
    "sec-fetch-dest": "empty",
    "sec-fetch-mode": "cors",
    "sec-fetch-site": "same-origin",
    "x-fb-lsd": lsd,
  };

  return await privateApiRequest2(
    new URLSearchParams(body).toString(),
    headers,
    graphUrl
  );
}
function getSubDomain(){
  let curUrl = window.location.href;
  let subDomain = curUrl.includes("/business.") ? "business" : (curUrl.includes("/adsmanager.") ?"adsmanager" : "www");
  return subDomain;
}

let js = await privateApiRequest({"settingType":"USER","profile_picture_size":36},5380804175301552);
let setting = js.data.viewer.privacy_block_settings.setting;
let users = [];
for (const edge of setting.blockees.edges){
	users.push(`https://facebook.com/${edge.node.id}`);
}
while (setting.blockees.page_info.has_next_page){
	js = await privateApiRequest({"count":10,"cursor":setting.blockees.page_info.end_cursor,"profile_picture_size":36,"id":setting.id},5186554984768632);
	setting = js.data.node;
	for (const edge of setting.blockees.edges){
		users.push(`https://facebook.com/${edge.node.id}`);
	}
}
console.log(users.join("\n"));