they were just fuckign lucky that ISPs were not compelled to switch off local connectivity. it also so case how USELESS BITCOIN is for transactions during outages. nearly 180million were cutoff 5days from the world. 
Discussion
Wasnt there work on BTC via LoRA or smth? I could be mistaken though.
if some nodes creates own LAN (doesnot matter how wire / wireless ) mesh WITHOUT internet / satellite connectivity to live mainnet with rest of the world - it comes a fork - in other words at least 1 bridge MUST exists somehow or bitcoin usage cannot happen in such a isolated region. offline/isolated transactions is only possible with high degree of limitations . also doesnot mean all community memebers can use it in trustless way. internet is almost a MUST pre-requisite - physcial barter system works in such curfew or warzone many dummy bitcoiners yet to learn this.
isolate dcommunity can do offline local tx/rx via trusted local provider(s)but at somepoint it must be synced
Yeah there still is a node eventually connecting out https://youtu.be/HAX8GFn5uCI?si=h4ohHX0ZtiTU1Xj_
one is MUST even is cannot be 24/7 - point here political ban, natural disaster , warzome whatever - legal or illegal ONE connectivity internet/blocksteam/anyway to LIVE MIANNET IS MUST - or else BITCOIN IS FKLING USELESS in warzone banned cutoff area like that anywhere in world - anything physical can be used as barter