Stellar Roots is the complete package modpack for 1.21.1. It has many favourites, suplemented with some newer or unknown mods.
The main things to do are farming and cooking hundreds of different meals, automating production with Create, Mekanism, Oritech and Modular Routers, setting up storage using Sophisticated Storage and Refined Storage, becoming a wizard with Ars Nouveau, or going to space with Stellaris!
The possibilities are endless. The pack also contains all the optimization mods needed to run smooth on most systems.
Make sure to check out the Gallery to see it for yourself!
Note that Mystical Agriculture ships disabled by default; if you wish to play with this mod you can re-enable it yourself in Modrinth.