Specifically designed to be less capable is the same as being restricted. It's purpose is explicitly to restrict the user communication to some predefined setting by a third party (the parent and company behind it) and the user is well aware of that, as this e-waste cost as much as a cheap or second hand smartphone.
The jukebox I got for my basement is not a restricted Spotify-enabled smart speaker. It's a different device that does something different.
It's not "restricted", it's designed to serve a different purpose. A bicycle is not a "restricted" car.