Myanmar scenario was like that but the tech chosen for the CBDC couldn’t deliver, mostly speed wise.
I think the requirement was to be able to “airdrop” money to the population almost at the same time and the centralized ledger solution couldn’t deliver.
So they went to USDT.

https://cointelegraph.com/news/myanmar-shadow-government-declares-stablecoin-usdt-an-official-currency