Face, height, frame, dicksize, autism, disability, disease, glasses... all the things that cane make you an incel in any other race applies to blackcels and I've seen it countless times.
The only way to not be incel as a black guy under 6ft is to have a 7+/10 face and/or BBC.
I've met average looking blackcels who were incel because they were under 6ft tall and weren't BBCmaxxed and thugmaxxed. Some of them cope with anime and watching anime as a black man is highly shunned in the black community.
The only incel trait that doesn't hurt black dudes that much is balding, because society is used to seeing shaven black heads.