No modal on drupal 10 site

Update: I confirmed that the script is loading properly, and the ouibounce-exit-modal element is indeed appearing on the page, but using the debugger, it seems like "ouibounce" is always coming through as undefined.

Drupal.behaviors.initOuibounce = {
    attach: function (context, settings) {
      once('init-ouibounce', document.getElementById('ouibounce-exit-modal'), context).forEach(function (item) {
        if (typeof ouibounce !== "undefined") {   // <=== this is showing up as undefined always

Update: I confirmed that the script is loading properly, and the ouibounce-exit-modal element is indeed appearing on the page, but using the debugger, it seems like "ouibounce" is always coming through as undefined.

Drupal.behaviors.initOuibounce = {
    attach: function (context, settings) {
      once('init-ouibounce', document.getElementById('ouibounce-exit-modal'), context).forEach(function (item) {
        if (typeof ouibounce !== "undefined") {   // <=== this is showing up as undefined always

@rolfl that would mean the ouibounce library is not present!