I just tried out a plugin for Lightroom that shows the used focus points and found that it works fine for RAW files (CR2), but fails for JPEGs. The plugin notifies me that the JPEG doesn't contain the necessary information to show the used focus points.
These JPEGs are exported from RAW files in Lightroom and all regular EXIF info (f-stop, shutter speed, ISO, etc.) is retained. However, the focus information is lost (this is also stated in the FAQ of the plugin).
Can I somehow retain the focussing data during an export to JPEG in LR?
I'm not affiliated with the plugin development, just a curious user.