But symmetrical about what?
The symmetrical option when creating a Rectangular Pattern is based on 'mirroring' about an axis. I'm not sure what would be the equivalent when creating a Circular Pattern.
I mean, symmetrical to a plane that connects the first position from a hole (orange hole) to the centerpoint (see attachment). Indeed it is just a mirror feature that you use but why is it available in a rectangular pattern and not in a circular. Doesn't seem logical