"If the two parties found themselves at odds on net zero, could they viably stay together in coalition?"

Who cares?

After decades of climate-denial and nuclear distractions, Libs and Nats are irrelevant on energy policy.

The real Opposition will be teals and Greens.
https://www.abc.net.au/news/2025-05-16/grattan-on-riday-david-littleproud-sussan-ley-nuclear/105297770