Why doesnt my xbox capture mic or ingame talking when recording?

Because it's Katherine the Ryo for 20 video card and audio hardware, which coming to change before a chat mixer

When I record a game clip on the Xbox One X my voice is not recorded even though all my mic settings are set to on. I'm totally confounded as to why this is so, since my mic is working with other apps and game chat. Supposedly this feature is built into
the Xbox One X capture system.

First, for regular recording using the Xbox Game DVR you can't record your voice.

And second, for use with the Xbox One you must use a mic with a 3.5mm input for use with a controller.

You can use for recording if you have some hardware like an ElGato game capture device and also have a cable that's 3.5mm so that you can speak to people ingame and also have it recording the mic on your computer via USB in the same video file. It may be
complicated but it will work if you have everything set up correctly.

ok. I have found .......AVerMedia Game Capture HD (C281)-Record Xbox 360 that does not need a computer while recording. Does anyone konw if this will also record the ingame chat between me and my friends. Thanks

Currently the Xbox Game DVR app does not support recording party chat.

You will have to use external hardware and software to capture party chat and ingame sound/video, like an ElGato.