As usual, nothing requires an update to the server, however Better Statistics Screen has serverside functionality to share stats between players if desired. All installed mods can be reconfigured using ModMenu to create a more ideal mc experience if desired.
Reach out if something feels bad, this pack is designed to introduce players to mods, and exactly just what kind of freedom they can unleash with just a little bit of tinkering.
Finally I have reached a point where I feel like that is the case, however I don't intend to stop! As more mods are updated to 1.21.6, I will continue to swap them in and out to get that perfect feeling. Reach out to @ahym on Discord if you have any ideas.