9 days and growth is very slow

Sieht alles soweit gut aus, manchmal brauchen sie ein paar Tage bis da mehr geht. Ab Tag 12 - 14 wird sie dann schneller wachsen.

Says who! She takes as long as she takes.

There’s no space between the leaves at all. Looks like they’re sitting on each other. To me that would say the lights too close/intense. Not a big deal, nor any damage done. You can just dim a little more or move it up a bit.

Looks totally fine for Day 9. Seedlings can be slow, most of the growth is happening below the soil. Just water lightly away from the stem, keep temps around 24–26°C, and don’t overthink the it, it’s normal. She’ll pick up soon enough.

Its looking good. Biggest thing most people run into at this stage is overwatering. Just make sure you don't oversaturate the soil. At this point I would be giving 2-3 shot glasses of water about an inch or two away from the stock/stem to encourage the roots to venture out a bit. Letting it dry back a bit between watering.

honestly everything looks good right now with your plant. if youre worried about the cotyledon leaves curling down then everythings all good with them and they curl down like that most of the time anyways. its not a judge of the plants health