Sounds like you want to study ID but are more interested in the science/engineering behind the products.
Look up companies that specialize in"biomedical prosthetics, wearable technology, devices connected to the internet" and see what education they look for. Maybe try to reach out to professionals in those areas so you can better understand what it’s like.
Oversimplifying things a bit…ID would be focused on how the product looks and interfaces with the user…Engineering or CS would focus on how and what makes it work.
Good luck.