This seemed like a game with a lot of potential but sadly I could not get it to run more than 2fps. Unreal games tend to cause my machine to struggle due to the low optimizations during build, which is something to take into account. Not everyone is going to be running 3090's. I didn't knock off to much for this though since it's a fairly common issue, just hope it makes you aware of this so you can prevent this in future projects.
(check to make sure you aren't executing code unnecessarily, lock frame rate if needed, batch items, not sure if unreal has these options but make objects static if they are non moving in your scene. These small changes can easily improve FPS for even low end machines) Also lighting can be a sore point as well, so bake lighting or reduce light bounces, ect...