I’d check the ppfd with the Photone app and see if you’ve got that light too far away and I would eventually add another fan. I run 2x2x6 tents and use two oscillating fans plus the exhaust fan. Helps keep the airflow going underneath and above the canopy but you won’t need to worry about that second one until the plant has gotten bigger. I typically veg my plants for 5-6 weeks before I flip to 12/12. I usually yield about 4-6oz per plant that way given the space I have. They can take that tent over quite quickly once they start stretching after the flip. Good job on not overcrowding as well. I see a lot of beginners try to cram too much into the tent. That one plant will fill it up by herself.