In the meantime you can emulate the remastered Switch version pretty easily.
This is incredibly good and relevant to me and i didn’t know this thank you
Already emulating the Xbox version on Xenia. It works. But key/mouse support would’ve been nice
You do you, of course, but I can’t imagine enjoying playing RDR with a keyboard and mouse. The marionette controls are already bad enough with a gamepad.
Yuzu will let you map your controls this way all the same.
Dolphin is a GameCube/Wii emulator and only runs GameCube and Wii games
For this instance, you need something like Yuzu or Ryujinx that can emulate the original Switch hardware and run the games made for it on PC