How to capture party chat audio in Xbox screen captures?

I have a few clips from last year where the voices of the people who were in my party at the time could be heard. Why doesn’t my xbox still do this? I often play with my friends and have moments where I wish I could capture a funny thing my friend said or simply be able have the party chat audio in the background of a screen capture. It is such a simple functionality that I don’t understand why you guys at Microsoft have either made it incredibly hard to find, or simply not included. Either way, I have clips from last year where party chat is included with the game audio. Please explain how I can enable this feature once again. Thanks

:)