Food production is already well above what is needed to feed the entire population.

On bread? Sure. "Food" is an almost meaningless term. With current technology there is nowhere near enough land to feed the world's population with what they all want: a lot of meat and dairy. I cannot help but be pessimistic on this one. Diet is such a core part of culture, people refuse to compromise on it, and no, the current technology is nowhere near offering an alternative at scale. And this is before even mentioning the animal-welfare disaster of contemporary factory farming.

due to disastrous Common Agriculture Pacts

Agreed that Europe's ag policy is disastrously counterproductive. But, respectfully, I still think you are seriously underestimating the challenge of feeding 9 billion people on meat, even excluding cows (which unfortunately a lot of people will continue to want). Most of the world's people will soon be living in overcrowded cities and demanding beef and pork wrapped in plastic. I'm having trouble seeing the home-raising of rabbits and pigeons at scale, although it's certainly a nice idea.

Unrecyclable plastics and other materials should be incinerated using pyrolitic combustion

I also thought it sounded cool when I learned about it. Plastic: gone! But it's completely unproven at scale and almost nobody is doing it. When's the breakthrough coming? And besides, even at scale this would be just another form of carbon pollution. Oil with with an energy-intensive plastic intermediate stage. Right now, it is simple more expensive than turning oil into new plastic.

Recycling is already less expensive to do than extracting raw materials

Incorrect for plastic, see above. Correct for other materials.

this is not in any degree denial of climate change

Sure, you seem like a rational person. Excessively optimistic IMO, but I agree that pessimism should be kept in check because it can be corrosive. There's always hope for making things better than they might otherwise be.