I am unaware of any current law that would require devices which can run software to be able to run arbitrary software. That being said, Google's Pixel phones

I am unaware of any current law that would require devices which can run software to be able to run arbitrary software. That being said, Google's Pixel phones have widely been known for their ability to unlock the bootloader and install an Android software of the user's choice. It was one of their selling points for a long time. If this ability is turned into a "possibility" that can be taken away at any time and if it has not been properly communicated to the customers, then it might qualify as false advertising.