There’s no need to play games at native resolution with DLSS or FSR. Play the game at 1080p and you’ll get 50+ fps on that hardware in the same scene.
But I also have a feeling your GPU is not your bottleneck because I can run an entire scene full of nanite at a steady 50 fps and I’ve only got a 4070ti so it’s not THAT much more powerful than your 3070. Besides, by the time UE5 is finished, we’ll be into the 6070 GPUs by then so it’s all moot.