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You might be interested in this.
Australia sphinx with nine other face carvings

https://soundhealthandlastingwealth.com/uncategorized/the-sydney-sphinx-mystery-behind-astonishing-face-carved-into-a-northern-beaches-rock-face-exposed/

This is the only pic I can find of this rock. Though I see another face pic on the beach near the location:
second face pic

No study that I can find on these