To export your GLB file from BRIO XR, from your project, click on the B icon in the top left corner, then select Export
Once exported, you can migrate to the open-source solution, <model-viewer> which takes GLTF/GLB files and USDZ files and enables 3D & AR.
<!-- Import the component -->
<script type="module" src="https://unpkg.com/@google/model-viewer/dist/model-viewer.min.js"></script>
<!-- Use it like any other HTML element -->
<model-viewer alt="My model” src="http://my-site.com/models/my-model.glb"
ios-src=”http://my-site.com/models/my-model.usdz” ar ar-modes="scene-viewer quick-look">
</model-viewer>
To export a similar script in an HTML file from BRIO XR, from your project, click on the B icon in the top left corner, then select Export then Export as Model Viewer.