InterSystems has always provided -- with each maintenance release -- a document that describes all the changes in that maintenance release. This document is known informally as the relnotes or (now) the MRNotes*. Here’s a link to one of them, just to make sure we’re on the same page: https://docs.intersystems.com/iris20211/csp/docbook/relnotes/index.html
Could you please comment here and tell us if you use this document and how you use it and what you use it for?