in my point of view, the answer is no. i only count the singers with their main activities on NND are utaite. The one who just use NND as their sub account will not.
Like *namirin, she is clearly considered as utaite since she has some covers on NND only; Mes can be considered as utaite too since she has a lot of collab works with utaite community. In contrary, JubyPhonic is not. And, following the requirements here, her works on NND even not passed the singer spotlight quality yet.