If there were a way to differentiate higher quality food in the store it doesn't need to cost more. People will prefer the higher quality produce and the low quality producers will need to adapt or die.

Higher quality food should cost more - it costs more to produce.

I'm envious of Japan's 'designer produce' tied to their gift culture. America doesn't really have much "This fruit is so much better, people are willing to pay 10x+ for it". I think our food system would be much better if we had $20 versions of all produce to get people to stop treating produce as fungible commodities.

Produce grown regeneratively doesnt cost more to produce mostly because of the lessened or eliminated chemical inputs. That doesnt mean that regenerative farmers arent getting a premium for their product. But, that is more the demand warrants a premium than a higher cost to produce.

Customers do pay more for organic food and non-GMO food that's certified.