Dell Latitude 7530, Windows 11, all latest updates 22H2. I just bought the headphones a few weeks ago, paired and was unable to get any output from mic, even when repairing or turning device on and off.
However, I found a solution that worked for me. I was able to get this working by going to "Sound Settings", then "More Sound Settings". Under the "Recording" tab and setting "Headset WH-1000XM5" as the default device. Despite setting the default device in the windows 11 sound settings, the headset was not selected as default in this recording tab.