1.21.4 Networking API changes

[vrglab]

Describe the Issue
In 1.21.4 networking works differently than 1.20.4 meaning certain implementations need changing

Expected behaviour
Networking works like before

Screenshots

Version (please complete the following information):

• ModLoaders: Fabric-Like
• Mc Version: 1.21.4
• Mod Version: 1.0.0