These calls usually are made from prison, with an outside accomplice. They are rarely caught.
People are sleepy, and concerned, and swear the voice they heard was the one of their child.
Another no-ai popular scam is done by stealing a WhatsApp account (e.g. by cloning the sim), and then contacting a friend or relative asking for a quick cash transfer for something urgent, to be returned the next day.
Deepfakes might make these scams more believable, but the core causes of the issue and the solutions have not changed.