the article reprints an article that reprints an article that refers to a small-scale but promising study from 2019 - https://www.researchgate.net/publication/335583033_Agrivoltaics_provide_mutual_benefits_across_the_food-energy-water_nexus_in_drylands
The area of the each test site was 9x18 meters, and the study seemingly was running only for a year or two. I am not sure if the results are as readily replicable as the articles claim. However, the point of the research was the plants that are adapted to shade - like cherry tomatoes and jalapenos - so it is not that surprising they'd thrive in such conditions, and humanity definitely should experiment MUCH more with stuff like this.