Absolutely there are still emissions.The big difference is that...

Absolutely there are still emissions.
The big difference is that the products of that MGP combusted gas actually produce something!
- Combusted in Yabulu to generate electricity
- Combusted by Dyno, 3rd parties & TECH eventually to produce their explosives, refinery products etc.

Through all of this, the BB met coal mines are continually outgassing.

So net outcome is the QLD economy has made products powered by BB met coal gas > MGP > Yabulu > TECH+ by using existing emissions.

In doing do, the otherwise required energy inputs into the above MGP products would have to come from somewhere, right?
So absolutely TECH is carbon negative just looking at the energy inputs.
Minviro's life cycle analysis certainly goes beyond this: https://www.minviro.com/resources/blogs/what-is-life-cycle-assessment-lca

Over time as you've mentioned, the NEM will become greener and Safeguard facilities will have to go greener and cleaner, perhaps moving to hydrogen etc. However, the met coal mines will still be producing coal until the global steel making industry fully shifts to alternative sources; and the mines will still be outgassing, well after their active life.

I reckon its a bit disingenuous to paint the TECH project with greenwash. It's the exact opposite!
I reckon also SG must get sick of saying it, but IMO he should keep starting every preso with:

QPM are a global critical mineral refining unicorn. We have:
- ISO-certified carbon negative project level
- Zero tailings or solid waste product
- Zero liquid waste discharge
- All ore/mineral through our entry gate leaving as sellable product
Show me your clean energy transition credentials!

Yes, Minister Bowen's chequebook is restricted to assisting QPME, through encouraging industry to reduce fugitive methane emissions.
Australia's Global Methane Pledge commitment should have some decent financial backing you would think, and any divvied our way would reduce QPME OPEX and increase revenue/profit, and thus support QPM indirectly.

It is Minister King's, NRF CEO Ivan Power and K-SURE's chequebook's that have extra heft and provide direct support to the end game: TECH.
QPM support news from any of these sources would certainly change sentiment!