Unfortunately, no. You cannot pay only for the Bravo TV cost. It is a valuable and great service that has been added by a TV provider already.
So, if you want to use Bravo TV, you will have to subscribe to a streaming platform that offers it and then pay accordingly. You can stream on Bravo TV without cable on SlingTV, DirecTV, fuboTV, Hulu, Spectrum TV, YouTube TV, or Xfinity TV choice.