I've moved this discussion across to a new topic. Based on when your usage info ceased being updated, my guess as to the cause of this problem would be that you have an interval meter rather than a full smart meter. Interval meters are electronic and read usage in 30 min blocks, but they are not remotely read smart meters and the usage will not appear under the current My Account usage system.
Getting in touch with customer service will help you determine what type of meter you have (or you could post a photo of it).
If you do have a smart meter and you still aren't seeing usage info on your account, there may be some other technical issue. If you send me a private message with your account details, I can have this investigated for you.
Sorry I didn't get a notification you had responded to this.
From app perceptive it actually says I have a smart meter and there isn't an option to put in your own meter read if you wanted (I do it for Gas), but yes It turns out it's a interval meter. I had put in a request for full meter details back to 2019, but from a separate complaint I was sent the full usage breakdown details for the year so far.
I had also rang the digital metering group who ended up agreeing to swap the meter out for a proper smart one.When the Tech turned up to install (yesterday) it was discovered that my apartment shared the same circuit or fuse(something) as another, so they couldn't turn the power off to replace the meter without effected the other apartment. I was told it would have to be referred to Ausgrid to rectify a separation(The tech had taken photos to send them). When the meter was last replace I know there was no sharing.