Beach Energy Limited, page-135

When did that sale take place, wasn't it several years ago from memory which means the $890M in provisions has nothing to do with the BMG abandoned costs but is actually for multiple other liabilities the company has down the track.
I was using COE as an example that eventually these sort of costs have to be paid by companies.
Maybe you need to do a bit more research before telling me to do some.

Note 19 in the 2021/22 Full year Results
The Group holds provisions for the future removal costs of offshore
and onshore oil and gas platforms, production facilities and pipelines
at different stages of the development, construction and end of their
economic lives. Most of these decommissioning events are many years
in the future and the precise requirements that will have to be met when
the removal event occurs are uncertain. Decommissioning technologies
and costs are constantly changing, as are political, environmental,
safety and public expectations. The timing and amounts of future cash
flows are subject to significant uncertainty and estimation is required in
determining the amounts of provisions to be recognised.