What exact use-case is the problem? Why exactly would you like the game on monitor 2? I can freely throw the game window left and right between monitors in borderless mode.
I think I'm missing where the issue is here, but just wanted to confirm that for me, having windows task bar on secondary screen works just fine - I have the task bar only on 2nd monitor, while I'm gaming on the main one. Still, why not address it? That's better than no response. I'm now wondering if this is a limitation of the engine that can't be changed. I'm surprised there's been no real workaround or response from on such a basic situation that most likely applies to a large percentage of people with PCs. This is the only game I've encountered these issues with - I've been able to at least cheese other titles into displaying there. Others have written that they're able to resize the windows, etc.
In addition, the window can't be resized. When moving the windowed version of the game to a different monitor, maximizing the window moves it back to the primary monitor. The only way I can get the game to appear on the second monitor is to make it the primary monitor. The Windows symbol shortcut doesn't work on my (and most other) systems, even when in alleged borderless window mode. Not only does the game not support selecting a monitor, it seems to actively fight against it.