Created attachment 174397 [details]
Sample XLSX with scatter chart
In Excel one can set the label option "Value From Cells", and select a cell range. This isn't supported in Calc, and thus isn't imported: the individual points have no label in Calc.
This bug report is about the XLSX import part, bug 103863 is open on the general feature.
Created attachment 174398 [details]
Screenshot in Excel
Created attachment 174404 [details]
The example file in Calc and the setting in Excel
See also bug 138436 with a PPTX sample file.
Dennis Francis committed a patch related to this issue.
It has been pushed to "master":
tdf#143942: oox: import/export labels from <c15:datalabelsRange>
It will be available in 7.3.0.
The patch should be included in the daily builds available at
https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.