I definitely think you haven’t used enough soil. Ideally you should have filled those pots to the top before planting. What soil you do have is going to become compacted as you water over the weeks and also due to the low level, you aren’t giving a big volume for the roots to grow in to.
I grow in Biobizz light mix (using Biobizz nutes) in 11L pots too, here’s a pic of my latest grow at 14 days old, before any lst:
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See how high the soil level is. I’d worry with yours that air wouldn’t circulate properly around or up under the canopy when she gets bigger. Also you leaves and stems etc will be shaded from the light by the sides of the pot - remember your plant received light from all angles as it bounces off the walls of your tent, this helps maximise light on the plant. The sides of your pots are going to prevent some light getting to your plants.