Well they're currently selling tickets from 6 January 2022. But whether flights actually start from that date is another story.
Based on the way their fares are filed, I suspect they may be looking to cancel the January flights at some point soon. Not sure about the February flights - they might remain in the schedule a bit longer, or could possibly fly - who knows!
I would be surprised if the MEL-LAX flights aren't back by April 2022.