Wow, that means ethereum will be used to provide the infrastructure to build CBDC.

I can mention the link to the news

https://coinmarketcap.com/de/headlines/news/ethereum-blockchain-chosen-by-reserve-bank-of-australia-for-issuing-cbdc/

That will be a very interesting thing but honestly I doubt about that as the scalability of ethereum will become the main problem that will prevent this massive adoption.
If CBDC will be successfully built on ethereum platform and I think more parties will be also using ethereum to create more CBDC.