Total population across the planet is most certainly still climbing each and every year - significantly. And prior history (e.g. USA during the Ellis lsland era circa 1890-1924) shows allowing & enabling immigration most certainly can be a way of markedly improving economic outlooks for not just the immigrants but also the prior residents - for at least the next few decades, if not a good bit beyond that, perhaps even into the next century.

And as for beyond that - again, my take is we should be celebrating that it looks like humanity, is not going blindly pop out babies beyond the carrying capacity of our planet.

Of course we likely could be facing massive challenges due to climate change and idiotic policies being dictated by short sighted oligarchies. But at least it looks like the kind of overpopulation overshoot that was feared by lots of 20th century analysts might get avoided due to some arguably rational reactions by younger generations to the world they now find themselves in.