"I also have a copy of her divorce application in 1923 before Arthur died so she didn't die with the chn."
Do the documents give us any clues on where she was living when the divorce application was made. what date where they completed and withdrawn, any clues as to the reason she was applying for divorce, and does it give details of the names of all children of the marriage.
As you state she was living in Broken Hill, her death or possible remarriage could be registered in NSW, SA, VIC Qld or she may even returned to WA.
All information you have would greatly assist us in finding daisy. last question have you checked if she is mentioned in any of her siblings death notices?.
cass