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