With regards to NSW rego letters:
For the past couple of weeks or so, I took over driving (delivery) duties temporarily for my driver (EDIT: the implication here is, I am on the road a lot... at least 4-5 hours a day every day), and the 'latest' I have come across is EXI... (that's "I" for "India"). I also saw a YouTube recently of a Sydney YouTuber taking delivery of a BYD Atto 3 on Dec 12 (or thereabouts, I forget now), and his rego was EXE...
Therefore I would safely say, forget EV and EW.... those are long gone.