Just a quickie - DD2 has suddenly got lovely flouro yellow nb poo

(I'm sure that's probably normal... midwife didn't seem bothered) and it's actually stained some of the nappies and boosters that are white or natural coloured. I washed with a rinse cycle followed by a regular cold wash (1/2 detergent). Will this staining come out with sunlight do you think?? It's not a huge concern, but as this will probably be last bub I'll be selling nappies as I no longer need them, so want them in as good as condition as possible for the next person to use
Cheers,
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Lori
Mum to Catie 3 & Sarah 6 months
ISO: Size 2 & 3 casual dresses (nothing fancy); Size 1 summer-weight sleeping bags;
medium Bubblebubs; OSFM Whizz Kidz fitteds; Whizz Kidz night nappies