Found thisWhen looking up Vegas security measures.
Casinos often set up metal detectors outside special events such as concerts, sports matches, or carnivals. People who do not wish to be scanned can simply leave the event.
Some Las Vegas casinos are also experimenting with microwave radar technology. Gun sensors are set up near entrances, and then casino staff can turn people away who show up on the radar. This was posted in March 2023. Maybe! There has to be a market in Vegas other than the Sphere.