Information about game symptoms with configuration (144 hz monitor, full screen, directx12/ultra quality graphics quality) limits the system to 1 FPS.
Performance problems in the game Red Dead Redemption 2 when full screen is activated in a 144 hz monitor, frames turns down to 1 FPS
Rockstar has submitted an update for version 1.32. Update the software as well as the latest Intel® Graphics Driver to improve performance, and make sure you are using the Vulkan API.