5.3 Load Balancers
With load balancers you can spread your players across multiple proxy servers. The loadbalancers is the first instance the client communicates with.
To see a list of your running load balancers just type
loadbalancer list
Creating a new load balancer
loadbalancer create <name> <port> <targetGroup>
The port is the port your players have to connect to. The default port for Minecraft Java Edition is 25565.