I saw willingness to share large-scale KMZs drop significantly after that incident. It definitely had an impact.

On Mon, Mar 4, 2024 at 1:55 PM Hunter Fuller via NANOG <nanog@nanog.org> wrote:
On Mon, Mar 4, 2024 at 12:37 PM Tom Beecher <beecher@beecher.cc> wrote:
>>  I think there is
>> a very careful attitude around making sure not just anyone can get
>> this information, especially after the Nashville bombing on Christmas
>> Day 2020.
>
> Keeping fiber location info close to the vest is nothing new. I'm not now sure why/how you feel like this connects to the Nashville incident.

I wouldn't say it's new, but in this area (TN Valley), things
definitely tightened up even more, in the wake of that incident.
Probably due to proximity to Nashville. I can't speak to any other
regions of course.