This guide provides a walkthrough of Mocap Manager, part of the Performance Capture Workflow Plugin, first released in Unreal Engine 5.6.
https://dev.epicgames.com/community/learning/tutorials/V1Y6/unreal-engine-mocap-manager-tutorial
Is there a plugin from rokoko i need in addition to this or will it see the suit on my network?
You will need to enable the Rokoko Live LInk pluigin which is available to download on FAB.