While for example Norway only has 30% fleet EVs despite already hitting near 100% sales.
It's setting up an unreasonable target for comparison to make progress look bad when even having a single battery powered truck would have been seen as amazing progress less than a decade ago.
Today, a couple of battery powered trucks is where they are at.
Private car owners generally don't have full stack control to custom order from manufacturers bypassing dealers, to build roads and energy supplies, to own lifetime maintenance in workshops, etc. in the same manner that Rio and BHP do.
How are the couple of battery powered haul paks charged? My guess would be from the same fossil fuel powered on site power stations the excavators are and not (yet) from custom built on site solar farms with over night battery storage.
Rio / BHP each have many mine sites - making a single mine site fully renewable (or at least 50%) renewable would be a good sign of progress. That's still not a thing, or even close, so far.
Perhaps you see this as "amazing progress", others have had greater expectations <shrug>.
That's a great goal, but every step along the way to it is also meaningful progress.
They currently have sites with 100% renewable power from buying PPAs for new solar farms, they have absolutely giant EV trucks, they have mini grids with solar and wind and batteries offseting diesel usage.
A lot of this is done for fundamental economic reasons and those economics continue to get better. They've committed Billions to it.