If i’m not mistaken that was a thing back in 2018 …
How long? Even two update cicles, around a month can have a difference in packages and their dependencies.
But if you missed the first time was replaced, then the newer packages got also a change, then another, there is no way without manual intervention to do those things.
Is a certainty that such place exists since Manjaro came out. Is called Announcements
If you are on stable branch, then here is such announcement that also has a wiki …
[Stable Update] 2022-02-27 - Kernels, Mesa 21.3.7, Plasma 5.24.2, Frameworks 5.91, Pipewire 0.3.47, Toolchain, Gstreamer 1.20, Nvidia 510.54
Mind you, if you missed the past 3 or 4 updates, you definitely have to manually fix some stuff …