I ride a bicycle all the time and always wear my hearing aids. My hearing is not that bad, typical ski slope high end loss. I want to hear what is going on around me with vehicles. I do set them with the ReSound Smart 3D app to “Outdoor” and have both noise reduction and wind noise reduction set to maximum and still hear vehicles coming up behind or beside me.
Yes the wind blowing over the hearing aids is slightly annoying, but I will deal with it for feel like I have a larger margin of safety. I also wear a skull cap under the helmet that covers my hearing aids and the top of my ears, still the wind noise is there, but I accept that as part of the situation.