yeah, if there was a silver bullet out there. No magical product that everyone is missing that can have a profound effect on your plants.
Can't polish a turd. Genetics is the cieling for potential... How many colas and light intensity are other factors that we can control. Stick to a little over 2 colas per sq ft and should be good dense nugs all over.. even if not huge, the quality will be top-notch with good DLI levels.
Want dense buds, make sure you are giving 35-40 DLI given ambient CO2 conditions. Stop growing autoflowers as they are less consistent. Plant 150% of what you need and cull the weak. That is a huge thing to avoid weak plants. If planting a shit load, less than 150% is probably better, lol.. but whatever is enough to cover defects and slow-growing plants.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7355821/
looks like that stuff is a good tool to manipulate structure of the plant more than anything else.
never trust "marijuana" sites with technical/science info.. riddled with bias if there is a product to be sold. Find some edu source or research. Research does not guarantee integrity, either. Always good to read the methedology section. Even professional researchers interject bias on purpose or through accidental incompetence at times. Samples sizes, choices of how they went about testing the hypothesis etc all paint a picture of the level of integrity.
saw one research paper recently where the metric to prove the effect was yield, and they didn't give the same DLI to each group of plants... That's a profoundly bad mistake for a PhD to make. Really botched the setup for that experiment. Muddies the water, unnecessarily.