Hi carlyjohnson80,
Thanks for posting in the Community! As of the moment, sending bills for approval is not available yet in QuickBooks Online Australia. That is a very good suggestion and I know a lot of customers can benefit on that. We appreciate if you can send your feedback or product suggestion by going to Gear icon and select Feedback so it will be reviewed by our Product Developers. On the other hand, you can also check here for any product updates we release every month.
Feel free to post again if you have any other questions, we're here to help. Have a nice day!