[gotiuser01]

When I use my Bluetooth headphone, I need to manually set a -200ms audio offset to get perfect a/v sync. I believe many users share the same experience when using their Bluetooth headphones. It would be great if there's a setting that allows us to set a pre-configured audio offset which will be automatically applied when Kodi detects a Bluetooth audio device connection. (And automatically reset the offset when the Bluetooth device is disconnected)

Perhaps show a message like "A Bluetooth audio device is connected / disconnected. Do you want to apply the pre-configured audio offset? / Do you want to reset the audio offset?" and a "Yes/No" option before actually making the change.

[vip.]

Yes, Bluetooth Delay is a useful thing.
In the meantime you can try Bluetooth Delay Addon. Although it is not automatic, but you can set a shortcut.