I’ve tested this several ways. My experience is medium and light roasts are highly responsive in 14-24 hours. After 24 it is very hard to pick up new flavors unless you cup side by side by side by side. Scientifically, it would have to be batch by batch for this cupping comparison. But if you begin searching you’ll learn that there is already consensus for medium to lighter roasts — of any size batch. 24 hours is optimum and development tapers off as the CO2 dies off.
Darker roasts have more CO2 and tend to develop longer over a few days to as much as a week. I have seen only ONE medium roast taste better in 3 days vs 1 day. Only one.