Lightroom 8.3, Build [201905061635-edecdfdb]
Windows 10 Pro
In Grid, select two CR2 raw files.
Export these to a DVD.
The DVD is missing the XMP files.
The DVD only has the CR2 raw files.
This is a bug.
If you export to a Hard Drive, the XMP and CR2 raw files arecopied as expected.
Thanks