The current build va004 has no options for configuration. The next build to be released around September 1st v005 will include settings and tools to better control the quality levels of the game. It's also worth pointing out we have done zero work for optimization in the game that will likely need to be addressed earlier than we anticipated if most people are having issues with stock unreal engine 5.
Tldr: next patch coming September 1st will be the first steps to addressing optimizations.