Hello Bendauncey,
A version of CodeWorks is included with your engine at
Program Files\Epic Games\UE_4.21\Engine\Extras\AndroidWorks\Win64
This should help you the rest of the way:
https://developer.oculus.com/documentation/unreal/latest/concepts/unreal-quick-start-guide-go/
Note: “Configure the AndroidManifest for deployment to Gear VR” setting is now called “Configure the AndroidManifest for deployment to Oculus Mobile”
Welcome to the Forums,