How to Fix the ‘No Available Graphic(s) Adapter Found’ Error in Wreckfest?

Have you checked if the Nvidia proprietary drivers are installed? I’m not familiar with your Linux distro, but sometimes even with those drivers, you may have to tweak the game’s launch command to ensure it uses the dedicated Nvidia GPU instead of the integrated one.

It sounds like you've got the drivers sorted since you mentioned you can run Counter-Strike 2 without issues. It might be worth trying to modify the launch options for Wreckfest. Make sure you set it to use the Nvidia GPU specifically. Sometimes Linux games need that extra push to recognize the right hardware!