Webxr AR Image Tracking

Hi three.js fam,
I’m relatively new to Three.js and am trying to learn how to integrate webXR API using image-tracking to start my threejs animation in AR. (I managed to work with the hit-test but for some reason, the image-tracking isn’t working for me. I believe it is because I just don’t fully understand how to integrate it).

I’m following this example: marker-tracking/explainer.md at 928aeb92010990be9bd713f3a660629e2c41b12c · immersive-web/marker-tracking · GitHub and keep getting that “The required feature ‘image-tracking’ is not supported”

Does anyone have resources to share? anything that can help me understand how threejs works with webXR?

thank you!