Shulker Drops Two is a minimalistic configurable mod that allows Shulkers to drop two or more shells, up to 64. It'll use the normal drop chance of shells by default. This means that the amount of shells dropped will only be altered if one would've dropped without the mod. You may also enable an option in the configuration page to make Shulkers always drop their shell and ignore the drop chance entirely.
All available config options:
You may freely use this mod in any modpack, as long as the download remains hosted within the CurseForge or Modrinth ecosystem.
Serilum.com contains an overview and more information on all mods available.
Comments are disabled as I'm unable to keep track of them across so many separate mod pages.
For issues, ideas, suggestions or anything else there is the Github repo. Thanks!
