Idk… Tbh I am not sure what they aree talking about.
Here in Spain and I think applies to Europe aswell the government can sent alerts per region or globally for any reason , Android and iOS handle it but I wouldn’t exactly call it a Google alert of course if Google fuck it up it wouldn’t work on Android phones. That said until recently at least here it had been barely tested, recently they did tests and finally seems to work fine but initially some phones didn’t receive anything, but as far as I know it was ISP provider issues, again not sure how the delivery is done so you get the alert