Droopy Oak Seedling

Morning Horticulture,

You may remember my post from a while back when my oak seedlings went a bit red and I was reassured by this kind community that it was just the plants making their own kind of sunscreen.

I have another question for you all: what level of droopiness is acceptable?

As well as different heights, my four seedlings seem to drop in their leaves by different amounts. Is the droop a sign of anything?

Over/under watering?

I'd love your feedback.

Thanks!