https://food.ec.europa.eu/food-safety/food-waste/eu-food-was...
Here, too, they consider “stop overproducing” to be the biggest problem on the pyramid. I’m not as familiar with this effort (nor if it, or any related initiative, affects to-go / disposal-ware) but one can reasonably imagine they are targeting all severely wasteful overproduction given enough time.
I’m not saying that individuals have no impact; our habits are absolutely important and we influence industry. But moving the needle on industry waste will have a more significant on the global situation than halving domestic waste in the UK.