From my research straps are not a code requirement and manufacturers installation instructions were 50/50 for securing screws on the flange.
An inspector who knows this could be an issue might recommend a strap but as long as the manufacturers instructions are followed there is nothing for an inspector to fault.
Proper adhesive is impossible to assess on an installed component.
Inspectors aren't allowed to take things apart without a homeowners consent, they can't remove cover plates to check wires or even open (remove the cover plate on) a breaker panel. Their hands are tied in a lot of cases.
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