In a perfect scenario you’d just have people have fewer babies. The issue is that countries want growth at all costs - the incentive is always more, bigger, faster.
Current forecasts are than we'll add about 3 billion human beings before population stabilises.
If you also take into account that the majority of human beings are poor by Western standards you can see that, IMO, sustainable global prosperity is likely impossible with these numbers, not least if we want to keep at least some wilderness on this planet.
That is happening.
https://www.worldometers.info/world-population/#growthrate