if I enable NDI either for composition output or for a screen in advanced output the stream is always at 60fps (tested with Newtek's NDI monitor).
That happens no matter fps I set in composition settings.
On Newtek's Studio Monitor (3.7) in window bar there is indication of resolution/frame rate.
In my case resolution follows composition, but framerate is always 60p.
Tried also in vMix with same result.
I'm on Windows 10