Good news: Fatshark added AMD FidelityFX Super Resolution with the Warrior Priest update, Patch 4.5.0, which will work even on non-AMD cards.
Bad news: You need to enable TAA for it to work. I prefer FXAA due to its lower performance hit on my old low-end GPU. Back 4 Blood, another game that supports AMD FidelityFX Super Resolution, allows you to use it with FXAA.