Where Valheim Plugins Actually Live
The BepInEx pack installs a loader next to the server binary, then reads DLLs from its plugins folder and writes a configuration file per plugin into the config folder on first launch. That first launch matters: start the server once after uploading a plugin, then reopen the config in the FSH file manager to find every option the author exposed. Framework mods such as Jotunn sit in the same folder as the plugins depending on them.

