This is an electronic obligation by the monetary regulator that is used as an instrument of payment. It seems like cryptocurrency but has a few different attributes:
Centralized issuer. The CBDC can’t be earned by mining or staking like usual cryptocurrencies. Only the national regulator (usually it is the central bank of government) can issue new digital coins.
Legal status. The CBDC is legal in the country that issued it. In the future it will be legal in other countries.