In conjunction with the other most recent post about clarifying the various terms for non-AHJ inspectors/agencies, you say this was approved by a third party agency inspector. Is that the case? Perfect example of the need for some sort of oversight, or peer review, no matter how the person is employed.
This may drift a little, so if you want to keep this thread on point, I get it. I am curious about your role, not being critical, but a little envious (what fun one could have!) Are you acting as a consultant to the owner, with no duties other than to provide them an opinion that they can use in whatever means they see fit? Do they then present items from your list to the builder? The inspection department? Is this an area outside of the one in which you carry legal enforcement responsibilities? Do they reference you in their presentation of any deficiencies? Are their licensing requirements to act in this capacity, such as a licensed home inspector? Do you carry insurance to operate in this capacity?
As a former licensed home inspector, in another time and place, I did construction inspections occasionally, and since then (not carrying any licensing or insurance) I have been asked to do this by private owners and realtors occasionally. I usually decline, or do it for free because I am not sure if there are any legal ramifications. I tell them I am presenting opinions based on education and experience, that nobody is under any responsibility to pay any attention to.
The photo is some very low hanging fruit, not something it would take anyone any time or training to find, but in general, I would expect you might hear some derision if/when your findings are presented to the building department. I expect there would be some excuses about the amount of time and attention you give a project vs. what an inspector has time to do. In the case of this photo, what is the reaction by the various entities when this was pointed out?