There were many posts asking about possibilities of various existing MSA features into MUIR,
Specifically regarding to the above feature, https://forum.uschess.org/t/game-stats-and-norms/60140/17 was it, statistics detailed in opponents’ rating group (every 100 points a group), and you could choose between pre-event and post-event ratings.
My understanding was, these features are considered enhancements and has to go through spec, approval, and implementation.