Congrats!
I got very similar results so far from my autos (though they're random/varied). It was interesting comparing, at least I know that plants here don't really mind growing right through the coldest parts of winter (not very cold). But the lower light definitely isn't ideal, and things like aphids really like low light.
I mean I didn't intentionally plant autos (they were just random seeds I tried to test), and they were transplanted 3 times, crappy weather/climate currently, but for soil in pots, I would definitely use larger/wider pots next time as 10l isn't enough imo, if I compare with my friend's autos in 20l pots.
Good luck dude.
I sort of randomly planted a bunch of autoflowers (also in 9-10l pots that I water about 0.5l a day too) that are at a similar stage and look quite similar in terms of growth. Some I sort of fimmed or topped (didn't know they'd be autoflowers), and I've got similar sort of conditions to you, a bit colder atm (going into winter) though, so It'll be interesting to compare.