Hi Peter,
I'm Paul and I'm here to help you with your concern.
Unfortunately, these audio enhancement settings are no more available with Windows 11.
You can only enable and disable the Audio Enhancemnets.
Open Settings >> System >> Sound >> click Speakers > then click Advanced >>click Advanced tab >> check< "Enable Audio Enhancemnets" >> click Apply >> OK.
I hope this helps. Feel free to ask back any questions and keep me posted.