[WebRTC] Undocumented RTCRtpEncodingParameters.keyFrameInterval?

MDN doesn't mention it, and I can't find a reference to any documentation online, however ChatGPT has lead me to believe that there "could" be an undocumented keyFrameInterval property for RTCRtpEncodingParameters: https://developer.mozilla.org/en-US/docs/Web/API/RTCRtpEncodingParameters

My assumption this would be most likely in a Chromium-based browser, and the "placebo effect" of using it is leading me to believe it's actually working, but I can't honestly tell.

Does anyone know anything of this parameter and if it's something that might be more available for general usage one day?