Hello,
I have the same issue on the Optiplex 3060 from dell. There only a front headphone jack option. After the last update, it disappeared as an option. The computer towers speakers and the headphone jack are no longer a registered output device on Windows 11. Every update causes a different issue. The most recent update caused this one. For previous issues, my only solution was to reset the pc.
Honestly the Windows 11 upgrade should not have been offered to everyone if it would crash the computer over and over again. I found out about the 10 day window to revert back to windows 10, after the 10 days from the upgrade.