For a quick scan Lighthouse needs no integration into any website’s backend. Just choose any of the 4 options, easiest is to type in your url in a webUI like https://pagespeed.web.dev/.

But having said that I decided to check out sprintr.home.mendix.com and found this on their page-body:

<script src="lightbox/js/jquery.lightbox-0.5.min.js"></script>