The VR controller input is essential to creating VR experiences because of the haptics and the physical sensation, but hand tracking can provide a more natural VR experience, both of which play a big role in the input when it comes to VR development .

Hand tracking is available on many XR devices, such as:

Oculus Quest 1-2,
Varjo VR-3 and XR-3
Hololens2
Glasses
Nreal AR glasses
Vive Focus 3, and many others

SDKs that provide access to VR hand tracking features

Oculus integration
Virtual grip
SteamVR
MRTK
XR Toolkit
VR Interaction Framework (IF)

There are certainly many more things that need to be covered and this is just a very high level of hand tracking tools and hardware that supports them. If you have any additional questions, please ask them in the comments, thanks!

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