The actual title is:
Bigger share of COP29 badges for Global South NGOs upsets rich-country groups
And the opposing argument is that the reduction of badges for NGOs from Western Europe et al. effectively makes it so that the governments of the countries with the largest emissions can control who gets to observe the conference from their respective countries. This is coupled with the fact that fewer people can attend in the first place than last time, since the venue is smaller.
To be honest, I don't know who's in the right here, but the article definitely feels like it's taking a side, and the editorialized title makes that bias worse.
I think more observers, and a larger venue, could be justified for the biggest climate conference of the world. I think this event should be more important than "you will own nothing and be happy" Davos for example.