Cannot turn off the Camera>Use Volume Button To Trigger Reco

I recently upgraded to iPhone 16 Pro Max with iOS 18.1 and am using BMCA 2.1.000170. I discovered almost immediately that I cannot turn off the Camera>Use Volume Button To Trigger Record selector. It is turned on and grayed out so that it cannot be toggled off. I cannot find the similar feature in the new iOS settings now either. I need to turn this off. How do I do that?
TIA
Sidney
TIA
Sidney