Those pledges include making steep cuts in climate-warming emissions within this decade and contributing to hundreds of billions of dollars needed each year by developing nations already struggling to cope with the impacts of climate change.
That could also complicate the talks among government ministers on the so-called cover decisions - which make up the core political deal from the two-week summit.
"We haven't seen huge solidarity between the developed and developing countries" but instead "disappointing commitments and action this year, which has dented trust."
Developing nations have demanded that COP27 agree to launch a special fund to address loss and damage.
The United States and other rich nations are wary of this idea, saying these rapid funds are better channeled through existing programs.