It's an Android setting. Assuming you're in the US, you can disable all warning channels (including Amber alerts) except the National one, which I believe has to be on by law, but is only supposed to be used in apocalypse level emergencies. The Hawaii thing was triggered by accident, iirc.
On my S24, it's in Settings > Safety and Emergency > Wireless Emergency Alerts.
I don't know if it's even possible to disable the National warnings, but you'd likely have to use adb or root your phone to do it.
It's giving "Please clap."