For 2u/3u/4u there is Cambridge, Maths in Focus and New Senior Mathematics which come with ebooks. Some of these have not been released yet but should be out soon.
For 2u/3u there is also harder hsc maths which come as ebooks only (but you can print them if you want to). It is not clear if they will produce books for 4u (although they have in the past and so that remains a possibility).
There are some which don’t include ebooks such as Terry Lee’s new books, Mastering HSC Mathematics books, Cambridge Checkpoints and the new ATAR Notes books.
Pascal Press will also produce new Excel books next year but they probably won’t come as ebooks - because their Standard 2 one doesn’t.