If you are looking for Forge version, it's here! https://www.curseforge.com/minecraft/mc-mods/ftb-teams
Library for mods that can utilize team progression like FTB Chunks and FTB Quests. In quests, it allows multiple people to complete the same quests together, in FTB Chunks it allows for team interactions between blocks without need to whitelist them otherwise.
To create a team, use "/ftbteams create Name here". To change it's settings, use "/ftbteams settings <key> <value>", use tab to cycle through them. Team data is stored in world/data/ftbteams folder.