Customizable Player Models Server-side Plugin
Allows on-the-fly skin/model changing using Customizable Player Models mod, provides the same features as if the mod is installed on a forge/fabric server.
Forge: https://www.curseforge.com/minecraft/mc-mods/custom-player-models
Fabric: https://www.curseforge.com/minecraft/mc-mods/custom-player-models-fabric
Discord server: https://discord.gg/mKyXdEsMZD