What I have missed with stablecoins is that how they fix the final settlement. That is say you send money from USA to say Somalia or North Korea. Who in those countries will have dollars most likely to give out for the stablecoin?
Paper dollars are a common store of value in emerging markets. Trading digital dollars for paper dollars, is becoming as common as paper foreign exchange
There are already hawala / xawala money transfer services in Somalia that will exchange cryptocurrencies for physical dollars or local currency, or load value onto a local phone app. Does that answer your question? https://en.wikipedia.org/wiki/Hawala
The final settlement inside Somalia or North Korea isn't necessary because they can buy things from other countries where those people can do the settlement. Just like if you have US dollar bills in Somalia, they have value even if there is no nearby ATM you can find to deposit them.
In practice, everyone just has binance app and pays each other stablecoins within that platform