For me Bruno is not R&B. When I think of R&B, it's music that doesn't rely heavily on Hip-Hop/Trap/Funk/Disco, EDM elements.

For example Donna Summer was a Disco/Pop artist whereas Anita Baker is an R&B. There is a clear distinction. Because a person is Black doesn't mean their music is R&B.

And even though Lauryn Hill sing & rap, her music has a more traditional R&B sound. Same cannot be said for Drake although he does the same.