JourneyMap Paper is available since 26.1 #252

JourneyMap is now available as Paper plugin:

On Paper servers, JourneyMap ships as a plugin rather than a mod. Place the JourneyMap Paper jar in your server's plugins folder instead of mods. The config and per-world behavior are otherwise the same as the mod-loader builds.

MapModCompanion 0.11 onwards will disable custom worldinfo:world_id handlers if JourneyMap is present (#253)