Focus peaking on the Z6 doesn't work for something like this. You get
a lot of "false positives" when working with a shallow depth of field.
For example, the red outlines will appear around this bug for quite
a wide range of positions of the focus ring, but most of those
positions will be slightly out of focus. But not to worry, because
magnification in the EVF allows you to focus more precisely.
Focus peaking is great for manual focus lenses when you
are working with a deeper DOF, but not for shots like this.
No idea what this bug is. My depth of bug knowledge
is shallower than the DOF in this photo.
Best viewed at original size.