I think it would be beneficial to split the shadow quality options from the light quality options so you can improve the performance. I know it was like that in the multiplayer Beta and the game was running much smoother for me.
Platform:
Steam
PC Specifications:
i9-9900k
64 GB DDR4 ram
1TB M.2 SSD
MSI 3090 gaming x trio
Windows 10
Resolution 2560x1440