I had the same problem. Turns out it is because I keep all startup services disabled including Realtek Audio services. Now once I have enabled it shows a notification on bottom right corner asking "which device you plugged in?" and selecting Headphones in it makes it work now.
Hope this helps.
That was the solution for me thank you so much!
- CRTL + ALT + DEL
- Startup apps
- RtkAudUService64.exe or similar -> enable