Get used to it. You aren't going to get more choices at the supermarket if a serious climate change agenda gets passed, you are going to get fewer, because the focus is going to be on local foods. After all, we can't spend carbon getting food halfway around the world.
Yeah, this.
The idea that we have less choice at supermarkets now than in the past is crazy. When my parents were kids they ate canned fruits and jams in the winter. When I was a kid we got fruit year round, but the off season fruits were pretty limited in choice. Now you get pretty much whatever you want at any time of year, though of course the quality still varies.
What is probably true is that the total variety is less. So if you travelled from place to place you'd see mostly the same choices with less variety between places than in the past. But the variety available in any one spot is much greater than it used to be.