Firstly congrats on the fry
Try frozen baby brine shrimp or dried rotifers if you can get them.
or failing that finely crushed flake.
when I had Burtoni (Haplochromis burtoni) Fry the mother used to crush flake and feed the fry herself. but I did need to remove them from the tank due to the male being aggressive and cannibalistic.
I would watch them carefully but if they are free swimming and have plenty of hiding places (rock crevices etc.) I think you may be fine.
just watch the tank mates like a hawk.
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