"Manufacturers tend to be less supportive of right-to-repair efforts, as corporations stand to make more money charging for tools, replacement parts, and repair services than if they were to just let people fix things on their own."

This is not the reason manufacturers oppose right-to-repair. They oppose right to repair because a device that is repaired is one less sale of a new device, and they do not want anything interfering with that "new device sales treadmill".