is there a way to copy/duplicate/clone a single EQ point (incl settings for dynamic etc.)
NOT a whole preset to a new instance, but within the existing instance.
At this point it's not possible to copy a single band within the same instance of Pro-Q 3.
Actually there's a quick and easy way to do it: split the band into L and R with the scissors button, then select each in turn and make them stereo again. Requires a couple more clicks than ctrl-c / ctrl-v but usually fewer than creating a new band and adjusting each parameter to match the one you want to copy.