Typically, the FCC has rules in place that would block companies from developing and selling consumer devices with unlicensed radar tech inside. The organization fears that allowing such products to be sold without restriction could lead to "harmful interference to authorized users in the band."
https://www.techspot.com/news/90397-fcc-grants-amazon-permission-develop-radar-based-sleep.html?utm_source=dlvr.it&utm_medium=blogger
https://www.techspot.com/news/90397-fcc-grants-amazon-permission-develop-radar-based-sleep.html?utm_source=dlvr.it&utm_medium=blogger