its either directly in the books refering guns specifically
or… it might have been an official out of the books source.
i used to be interested in this shit over a decade ago when the last books weren’t yet finished: there was a fancy flash based official site where lore snippets and bullshit from jk got published
but she did just what you described
I remember reading it
I don’t remember which book but I also have this clear memory of a quick passage saying all the magic around them was messing up with electronics.
Also I’m pretty sure in the Deathly Hallows they use the internet to follow Death Eaters sighting while they are in hiding
(Been a while… and I’m not bothered enough to go check 🤣)
its either directly in the books refering guns specifically or… it might have been an official out of the books source.
i used to be interested in this shit over a decade ago when the last books weren’t yet finished: there was a fancy flash based official site where lore snippets and bullshit from jk got published