R3F & StereoCamera

[MaxTwentythree]

Hi, 👋

I'm trying to implement the three.js StereoCamera with r3f.
Here the three.js example

And it drives me nuts as it should be fairly simple, but all my attempts lead to only the right Camera getting rendered.

I created a simple sandbox to showcase this (takes a bit to load):
Codesandbox

I tried using StereoCamera and StereoEffect from three, both lead to the same result.

Am I missing something? Has someone encountered this before?