Yes, when I lived in the Midwest US, that was definitely an issue I dealt with. But after living in other parts of the world—like Asia and the Middle East—I realized that the soil composition and mineral balance vary dramatically by region. While gypsum was incredibly effective at breaking up the dense clay back in the U.S., I quickly found myself going down a rabbit hole in other climates, trying to figure out how to create a proper balance in the soil. As if I used gypsum here, it will break up the clay, but create more calcium- however most is massive raised beds (about 17ft off the ground), so much of that was from quarries- which again, even tho it was a type of clay (rock hard- need a jack hammer hard) it actaully needed more organic material (most expensive here).
With my tomatoes here: it is not about growing, my amendments are brilliant... it is the pearly eyed thrashers that eat them the moment they are vaguely ripe!
What worked in one place didn’t always translate to another, and it became clear that improving soil isn’t just about structure—it’s about understanding the full mineral and nutrient profile in context.
I think the gypsum should help you- you can also sprinkle around the tomatoes, and water it in