It’s simple stop making plastics that cannot be recycled as there are enough that can be recycled to keep us consumers happy, it comes down to pounds shillings and pence sadly rather than a moral obligation to the planet and our future generations.
I know from my present job there are companies making headway in these fields it’s just getting the big players to change to new plastics, there’s considerations such as how does it make the sandwich look? Does it feel good to touch?