Hi ckst, this is Kimberly, an independent advisor. I'm glad to assist you today.
It sounds like your PC only supports a single TRRS combo jack, and Windows currently sees your headset as an audio output device only, the mic isn’t recognized, even though your headset has one.
Here’s a plan-of-action to solve that issue without going through risky uninstalling or system resets:
If your headset has a 4‑pin TRRS plug (three rings: Left, Right, Mic, Ground) but your computer treats it as headphone-only, the mic line won't be detected.
Use a 3.5 mm TRRS splitter/adaptor
Plug your headset’s TRRS plug into a TRRS-to‑dual TRS Y-splitter, so the mic gets its own mic input port and the audio output goes to headphone port.
This simple step solved the issue in many cases.
Or you can use a USB audio adapter, which effectively bypasses the combo jack entirely and presents separate mic/headphone channels over USB.
Should you have more questions, please let me know.
Best regards,
Kimberly