They said that the milk pumped at night consist of melatonin but tbh not everyone is blessed with oversupply. Also, bf is tiring enough, if still have to follow strictly certain timings milk cannot give at this/that time, it’s gonna be even more stressful 😅.
Whatever you have, regardless of what time it’s pumped, just feed accordingly. My baby drinks bm from all timings and still sleeps normally at night.