My wife is an ASL teacher so she has a lot of Deaf friends and is very active in the community, I think in general most people who end up with implants go with the “hide it as much as possible” approach. That’s why you see so many skin/hair color type choices for materials which are made to let them blend in. Most of her friends have hair styles that cover up as much of the tech as possible.
There is a lot of technology innovation that goes into the products, but I think it’s just never been a big request to make them stand out more as products - could be an interesting design brief though. Underserved products are always the ripest for innovation. 
My wife’s cousin used to work in marketing at Starkey hearing aids in MN - probably has some contacts still floating around.