Is the Series 8 watch bluetooth hearing aid compatible?
Is the Series 8 watch bluetooth hearing aid compatible?
Apple Watch Series 6, watchOS 9
Question marked as
It is more appropriate to begin by asking whether your intended hearing aids meet the general Made for iPhone certification. If they are not approved for iPhone it is doubtful they will work with any Apple device.
More details in Use Made for iPhone hearing devices - Apple Support but be cautious when checking the lists of certified devices, because they might have different lists for availability in different world regions.
As a general concept I think you will find that Bluetooth hearing aids usually pair to the iPhone rather than the Apple Watch. The watch might then act as a remote control to adjust volume. However, each HA model is different and functions should be checked direct with manufacturers.