I understand it’s a very long shot, but are there any plans to implement some functionality that would allow us to detect primacy and novelty effects? The literature is very scarce on the methodology but I’ve been trying to decypher this paper: https://arxiv.org/pdf/2102.12893.pdf but been having trouble

There aren't currently plans to implement a system like this. However, cumulative effect time series can at least give you some indication of how things are trending over time and we've made a lot of progress towards releasing those for experimenters.