While not quite the solution you are seeking, we wanted to give our kid access to whatever music they want to hear but without having a screen based device, so

While not quite the solution you are seeking, we wanted to give our kid access to whatever music they want to hear but without having a screen based device, so we bought a used Google Nest mini speaker. It works very well. Some clever kid could take one of those to school, get it setup on the wifi just outside school, then bring it in and say it's not a phone.