Thylacoleo sightings in Australia?

What is this about Marsupial Lion (Thylacoleo
carnifex) sightings in Australia? Sounds intriguing...

https://prehistoric-fauna.com/image/...ze-738x591.jpg

https://upload.wikimedia.org/wikiped...carnifex_1.JPG

Marsupial lion (Thylacoleo Owen, 1859)
Order: Diprotodontia
Family: †Thylacoleonidae
Dimensions: length - 1,5 m, height - 80 сm, weight -130 kg
Temporal range: lived in Australia from the late Pliocene to the late Pleistocene (2 million to 30 thousand years ago)

Had the strongest bite force of any animal extinct or alive.

https://youtu.be/e9cGe-rEoOQ?si=Y2gQtyOMk9QQ4SS1