Hi!
Some of these are listed in the patch notes for each World Update. For example, last World Update:
https://forums.flightsimulator.com/t/release-release-notes-1-15-7-0-world-update-iv-france-benelux-now-available/389982
Updates that are posted in the forum use the #patch-notes tag. Here is a listing of posts using that tag:
Latest patch-notes topics - Microsoft Flight Simulator Forums