Well that's a tough question, plant looks great to me, a little small for the pot but quality and health of the plant looks good! Doesn't look like you stressed it or anything, some training like Super-cropping and FIM or Top while vegging can increase your production. I use both Super-crop and FIM on every plant I flower unless I'm doing a pheno hunt, those are the only plants I'll let flower without training to gage the natural growth pattern/production. You can take a relatively low or medium production plant and turn it into a decent producer with some training.
That said, genetics plays the biggest role, not sure what strain that is but I run strains that produce very little compared to others, but I like the quality so I don't mind. Try training a clone from it if you kept one and you'll get an idea of how much more you can get from a plant with a little training. Lots of reference info on this site if you search for super-crop, FIM, or Topping. Cheers.
Here's one that normally would produce "medium". With some super-crops and FIM's, it produces more or less 50% more than letting it grow naturally:
View attachment 3620708
