Generally, if insurance proceeds have made you whole (i.e., the recovery has fully compensated you for your loss), then you have nothing to report on your federal income tax return on Form 4684.
However, you would normally have to report that part of the insurance proceeds that were attributable to lost rental income as rental income on your federal income tax return (Schedule E, typically).
It is not clear how you determined FMV (which metric or modality), but caution needs to be exercised in that regard. I can tell you from personal experience, having also been through Ian and having made insurance claims, that the FMV of my properties actually increased after the storm.
Finally, if you used the entire portion of the insurance proceeds that was allocated to damaged/destroyed property to effect repairs and replace personal property, you likely have neither a gain nor a loss.
