Dimensional Tracker

Fabric mod that color nicknames based on their dimension.
Compatible with VT AFK Display and Sessility Mod.

Green = Overworld
Red = The Nether
Purple = The End

This mod utilizes vanilla scoreboard teams to color nicknames.

CurseForge, Modrinth, My Discord

Customization

If you don't want to be detected, simply join a different team.
You can modify your team's color, add a prefix or suffix using the standard Minecraft /team command.
To add support for non-vanilla dimensions, create a team named dimTracker.<dimension_name>.

Why this mod instead of datapacks?

Because of how datapacks work they should check dimensions every tick. It's okay for singleplayer, but on servers it can cause lag.
In testing, I saw that it can take up to 30% of MSPT for 10 players:

Example of how it works using Immersive Portals