@Bev54 if you have not sorted it out slightly different on devices older than S20(with dedicated Bixby Button). Go to Settings-Advanced Features- Bixby Key and change single Press to Double Press for Bixby. You can use a single press to open another app or Run quick command such as Answer Phone or Daily Routine. Pressing and holding the Bixby Key always opens Bixby Voice.
on more Modern Devices have the Side Key settings and no need to use Bixby for either option (Double Press/Press and hold).
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .