You can move other players between servers.
Basic
/stp <player> <server>
Send Kamesuta to 'pvp' server
/stp Kamesuta #pvp
Send all players in network to the server which Notch is playing
/stp @a Notch
Send all players in 'resource' server to 'survival' server
/stp #resource #survival
Commands require 'servertp' permission
/lpv user Kamesuta permission set servertp true
(LuckPerms for velocity command)