It makes no sense. Several commercial parts available, like MAX2991
Power lines are notorious for being noisy and the transmission line impedance is unreliable. That is why the old X10 standard had an upper limit on the carrier frequency and the data rate was V...E...R...Y slow.
There are a number of products out in the market today to replace the X10 using WiFi or a WiFi/BLE combo. I currently use a set of devices that can be controlled by a Personal Voice Assistant to control my lights.
Although there may not be a direct app note on the Cypress system to this effect, Cypress has both WiFI and BLE proudcts that can be used to create such an ecosystem.
You might what to check out this KB post: Adding AWS IoT Thing Parameters - KBA228420