Specifically, using atmospheric/dissolved sulfur compounds to power energy-producing chemical reactions in Plant-like organisms
Im looking to make a planet where due to a thick cloudy atmosphere, photosynthesis only really exists in the upper atmosphere and chemosynthesis is the primary form of energy production, so "plants" have evolved to use Chemsynthesis instead of Photosynthesis.
EDIT: Was thinking that this world was relatively new (say, 2.5-2.6 billion years old), or the sulfur gets replenished by decomposers releasing the sulfur compounds back into the environment from dead autotrophs, or a series of geothermal activity releases new sulfur along with the compounds being recycled
EDIT 2; ELECTRIC BOOGALOO: When I mean "energy production" I mean it in how it's the baseline for energy in an ecosystem
Edit 3: im sorry for my lack of knowledge in biochemistry, my only real experience with it was a high school biology class I had in freshman year of high school, I was fully and well aware of Chemosynthetic organisms existing on Earth, I'm just curious on if complex, multicellular life based on chemosynthesis is possible and not just Microbes