I opened a issue request, it was closed even though it still doesn't work.

Please use the same issue and don't open new ones.

Also saying "doesn't work" is not a very good way to explain what the problem is.

The groups don't sync between servers

https://github.com/lucko/LuckPerms/wiki/Syncing-data-between-servers

https://github.com/lucko/LuckPerms/wiki/FAQ#how-do-i-get-permissions-to-sync-across-multiple-servers