This is interesting from that article:
McGuire also said that Australian officials told Djokovic upon his arrival last week that if he had agreed to get one vaccination shot, they would have cleared him to enter the country because they would have counted his positive Covid-19 test last month as one vaccination as well.
“Had Novak Djokovic on Sunday or Monday acquiesced to taking a vaccination in Australia, they would have said Dec. 16 you had Covid, we’ll tick that off as one one vaccination, you’ve got the second one, all clear you can play,” he said. “He hasn’t done that.”
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So they offered him to take a jab and stay, all done, and he still wouldn't do it. He does really think he's bigger than Australian law. They really sort of have to yank his visa.