Better Ping Display [Forge/NeoForge]
Adds a configurable numerical ping display to the player list
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Better Ping Display [Forge/NeoForge]
Better Ping Display - Forge/NeoForge Edition
This is a Forge mod. For the Fabric version of this mod, click %%MD0%%.
A mod for Minecraft to display each player's ping in the player list as a number. There is also a config file for changing the text color and format (available for Minecraft 1.12+ only).

This is a client-side mod. The server doesn't need to have it installed. It works even when playing on vanilla servers.
Configuration
See https://github.com/vladmarica/better-ping-display#configuration for an explanation of what the various config options do.