Play games on my TV as a second display while working on the primary screen

For work, it depends on what work you want to do, but it would be hard to make it work.

Most games need to be the active window to accept input, and also, most work software needs focus to accept any click or keyboard inputs. And its built into windows pretty deep that there can only be ONE active window.

Even if you could have multiple active windows, you would have to be able to untangle outputs, like if you are writing a report you don't want to open the inventory of the player every time you press I; and also untangle audio outputs (not that hard to do under Windows 10, but yeah, still annoying)

I would say that because of the first 2 problems I listed, it is impossible to do what you ask, that one window be a game and the second be work.

The only work you can do while doing so would be passive work. If you need to watch a video or a livestream for a formation/conference, then you could put the sound of Chrome or Zoom on your headphones, and the sound of the game on the TV or the headphones of the player.