Many thanks to SWLing Post contributor, Harald Kuhl (DL1ABJ), who clears up a little confusion:

it was reported that ABC Northern Territory Shortwave Services left shortwave for good.

I asked them and they replied they will be back on coming Tuesday:

Dear Mr Kuhl,

Thank you for your note. The service you are referring to will be re-established next Tuesday morning at 9am local time.

Kind Regards,

ABC Reception Advice
Communications Networks

Thank you Harald. I, too, have seen a lot of notices on social media that the ABC Northern Territory Shortwave Services had shut down permanently. I had not posted anything here because I couldn’t find any mention or confirmation from ABC. Looks like they’re probably doing routine maintenance.