Is she healthy looking? Any

Is that premixed soil?Looks a little hot.I shouldn't worry too much but its clearly not good for seedlings but she's almost out of that stage so shouldn't be a problem but keep an eye out.

Phosphorus

Isn't that a ready-made grow bucket? Just add the seed? If so, that plant is not enjoying the soil mixture. If not, you're in luck because you can regulate the nutrients yourself. She's having to process too much nitrogen. That's the yellow discoloration on the tips and edges of your leaves and also why your leaves are on the darker side of green. Unless that's due to your light and camera. Give her just ph'd water for about a week and see if the problem persists. The damage won't go away but shouldn't appear on any other leaves from now on. After she is stable, perhaps you can start her off on the nutrients again, but half doses. Hope this helps, even a little.

Overfed. You see obvious discoloration ? Leaf already too dark - aka overfed again, so not photo efficient too ... White bucket would be second from last to choose grow in ... Bucket could be filled till verge. I would choose different plate , raised roller/trolley works way better and for root aeration and for gravity to protect you from overwatering , plus plant dont stand in run off. Diary would help more ...

Does it a Have enough water going threw her. Is that a microwave glass plate 😄.

Healthy!. Burnt mate, just give ph'd water next few feeds.. it's not about filing her full of chemicals. Feed the soil and that will look after her.. wet n dry feed 100%.. Happy