If they're growing on your windowsill, they look really good for such small pots. They would already prefer to move to a 10-15 liter pot, but you apparently don't plan on transplanting?! 👆 I would transplant!
In the second photo, you can clearly see overwatering of the substrate; you're either watering them too much or the pot volume is too small and the evaporation happens quickly. The plants are stretching towards the light, towards the window. That's normal! My first grow was on a windowsill! I was running around the house with this AK-47 auto plant; I grew it in a 13-liter pot filled with 10 liters of soil + mix. I would turn the pot with the plant when it leaned towards the window, and it corrected itself geometrically! I got a good yield that time and vowed that I would always grow! 👌
I wish you all the best, my friend! 👍
Good luck! ✊😇