WebXR direct hand input

[Maksims]

Currently, the engine supports WebXR input interactions with UI using a ray provided by input sources. With hands - it is possible to implement direct touch using the tip of a finger (or multiple fingers).

There are some UX considerations, as even different platforms implement direct touch slightly differently.

[IRobot1]

The usual approach is to attach a collision object to the tip of the fingers. See xr-hand for fingers and tips

[Maksims]

The usual approach is to attach a collision object to the tip of the fingers. See xr-hand for fingers and tips

Using collision would not be a generic solution, as it would require a physics included. Also UI does not have physics information.
It should be analytical, using rays like input source ray does, with slight modifications.