Looking better. But what’s concerning is the cotyledon turning yellow already. Bit odd so early on. How much are you feeding her currently ppm wise bro? Might be time to bump her feeds up a lil bit. Try mix some calmag in if you have any too. It could be possible that she has used up her nutrients in those leaves. They do use them up quickly, but mine don’t usually start dying off until around 3-4 weeks in. I think she is getting hungry for more food now that she is getting better
Edit:
Just went back a page and noticed you fed ph water and 150 ppm of nutrients.
What I suggest is that you bump those nutrients up to around 350. Do that for a few days then continue to work up. I never really go over 600 ppms. My autos thrive around 500-550