This is a Forge mod. For the Fabric version of this mod, go here.
A mod for displaying each player's ping in the player list as a number.
This is a client side mod. The server doesn't need to have it installed. It can even be used when playing on vanilla servers.
Requirements
Minecraft Forge
Configuration
See https://github.com/vladmarica/better-ping-display#configuration for an explanation of what the various config options do.