Two giraffes have been transferred from Australia Zoo to Werribee. A statement from Werribee said the pair were sub-adults and that they are planning to announce more in mid-November.
Video footage of one of the two giraffes during transfer shows it to be one of the zoo's breeding females, the one who lost part of her Ossicone earlier this year (I believe it is Rosie, though I'm not 100% confident). This brings the breeding group at Australia Zoo down to 1.2.
Based on statements from motorists who saw the giraffe, the second is indeed a sub-adult. If I had to hazard a guess, I'd say it would be Jesse, who is the oldest of the juveniles at the zoo, being born in 2021.
Giraffe pokes its head from back of truck on busy Sydney highway