Have you voted and commented here: Multiple screens functionality? It’s a start to what you want. I understand it’s not actually your issue but the creation of secondary cameras to display independently is the core of your request.
The feature has been requested for ages and at this point I think its quite some time away for two reasons: 1). there are FAR bigger fish to fry at this point in the development and 2). It’s not something that I think you could really even do on an xbox and I’d be absolutely shocked if PC exclusive feature development wasn’t put on a back burner right now.