Ofcourse that's what proper Bitcoin sidechains would solve. A Nation or community could have their own sidechain with Bitcoin pegs, for local or global usage. Should be possible to detach the chain from the rest of the Bitcoin Network and use it on local internet or even offline. They can always rejoin the rest of the global networks to exchange the pegged bitcoins for bitcoins.
It's important to have a robust auxiliary Bitcoin sidechain Network that is according to the principles of main Bitcoin Network.
The auxiliary network should be completely decentralized with no point of failure or centralization such that when service providers for example continuously vanish from the network, others will automatically and always take their places and continue to render the services. And there should be zero of chance of having coins locked somewhere and not released because the service providers are nolonger available or they lost their keys. One of the viable solutions to this is to allow anyone regardless of the economic statues to provide this services by having stablecoins that sort of back the bitcoins that users would be sending to the addresses they control on the mainchain. If they vanish with the bitcoins, the backed stablecoins can always be paid to the users. Besides the stablecoins could be earning interest as incentives while locked on the auxiliary network.