Unfortunately, you can’t. Cyberpunk 2077 will only be playable in the first-person mode.
First Person only?
Yes, First Person Perspective. Not a decision made easily, but at CDPR, the story matters most. For CP2077, first-person works best for the story they are going to tell us. V will be your character, and hopefully, you will become V. If you’re just dying to be able to see more of yourself as V, CDPR has been confirmed that there will be an inventory view, mirrors and that the game will have some form of photo-mode.