Hi friend!
I’m sorry your plant isn’t as big as you would like. I’ve noticed some of the photos you have posted have the leaves drooping. I don’t see any discoloration or burnt tips... You may have been overwatering the plants which could have cause some stunting in growth. Specifically root development, when plants are overwatered the roots don’t spread as quickly.
I would also recommend low stress training a bit sooner on your next grow if you’re wanting more top colas next time.
Best of luck with your grow! 👍🏻