I also use Unreal engine 5 for my games but i don't use lumen or nanite, good for you, you have a strong card. If you get time kindly check my game as well which is also made with UE5, thank you!
Yee ^^ I actually have a 3090 for my streaming system and a 4090 for my main workstation, but let some playtesters with a variety of GPUs test it to ensure it would run well for most people. And yes I can check out your game once I have a chance ^^ Happy to see others going for UE5