I’m on a 9700k with a RTX3060 running a 1080p TV with dldsr resolution of 2880x1620 and can run high to ultra settings and maintain 35-40 FPS with 2 panels popped out onto tablets. I use HAGS on and I disabled virtualization in the bios . I also use game mode on. I have overclocked my CPU to 5ghz.
I only use tlod and olod at 125 though, any higher and I get lag in the frames. Maybe lower your Lod a little and see how that goes. Are you using high traffic levels? If so lower those too.