It’s an ex-TC now:

http://www.bom.gov.au/products/IDQ65002.shtml
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IDQ20065
Australian Bureau of Meteorology
Tropical Cyclone Warning Centre
TROPICAL CYCLONE INFORMATION BULLETIN
Issued at 4:17 pm EST on Sunday 2 January 2022
At 4 pm AEST Sunday, Ex-Tropical Cyclone Seth with central pressure 987 hPa was
located
near latitude 26.5 south longitude 158.6 east, which is about 590 km east
southeast of Hervey Bay and 560 km east of Brisbane.
The system is moving south southwest at 15 kilometres per hour.
Ex-Tropical Cyclone Seth has transitioned to a sub-tropical system. Although it
is no longer classified as a tropical cyclone, the system will continue to
produce gale force winds as it moves south to south-westward during the
remainder of Sunday.
On Monday, Ex-Tropical Cyclone Seth is expected to take a more westward motion
and may approach the northern NSW or southern QLD coasts mid-week, however the
exact path the system takes is uncertain at this time.
Ex-Tropical Cyclone Seth is not expected to directly impact the coastline in
the next 48 hours, however it will cause dangerous surf, abnormally high tides
about the southeast Queensland and northeast New South Wales coastlines. If the
remnants of the system approach the southeast Queensland coast during Tuesday
and Wednesday, strong and gusty winds, possibly damaging may develop ahead of
the system. Separate Severe Weather Warnings are current for these conditions;
refer to those products for more information.
This will be the last Information Bulletin issued for this system.
http://www.bom.gov.au/cgi-bin/wrap_fwo.pl?IDQ20065.txt