They are designed to be easy to bypass. Plenty of tutorials exist online and I can't imagine that Meta engineers didn't know about it beforehand.
> Take control of your privacy with this easy-to-use LED and Camera Blocker
> Designed for users who value discretion, this accessory covers the video recording LED and optionally blocks the front-facing camera — perfect for content creators, streamers, or anyone in sensitive environments.
There is two parts, one to block the LED, and an option to al part to block the camera.