Hi,
Were you able to try this: first, check that Windows 11 is actually using your Bluetooth headphones as the default playback device by right-clicking the speaker icon and opening Sound settings, then under Output, select your Zebuds headphones. If they’re already selected but still silent, confirm that the Stereo (A2DP) profile is enabled rather than the low-quality “Hands-Free” profile by going to Device properties, Additional device properties, and Services. Next, try removing the headphones from Bluetooth settings, restarting the PC, and pairing them again, since Windows can sometimes assign the wrong audio profile on initial connection. Finally, check Optional Windows Updates under Settings, Windows Update, Advanced options, Optional updates, as some updates fix Bluetooth audio issues on Windows 11. This approach covers default device selection, proper audio profile, clean re-pairing, and system updates, which are the most common causes of sound not coming through after an OS upgrade.
Kind regards,