I'm not sure this is going to work, at some point you come up against a ceiling of what is possible on a single planet in terms of population, amount of technology, and the resources available. I'm sure you are aware of Overshoot Day, it's the day every year we run out of the amount of resources the Earth can produce in that year. It's simple math really, unless we start offloading people off the planet, nature is going to do all of this for us.
https://www.overshootday.org/
Earth's carrying capacity is 10 billion and if anyone thinks that any kind of technology will save us against the simple math of limited resources, a finite size and exponential population growth, they are just kidding themselves-- sometimes literarily!