Apparently this issue has been reported on earlier by @datum and viewed more than 425 times; however, that thread was closed before an answer was given: Export Calc chart as SVG - missing x-axis labels!!
Today, using Calc Version: 220.127.116.11 (X86_64) / LibreOffice Community
Build ID: 9f56dff12ba03b9acd7730a5a481eea045e468f3
CPU threads: 12; OS: Windows 10.0 Build 19045; UI render: Skia/Raster; VCL: win
Locale: en-US (en_US); UI: en-US
This issue persists. I’ve tried other export formats including EPS. EPS has a different set of issues, but at least the labels are included for both axis, x & y. This will afford a work around but will require that each grid line’s width be changed for both axis.
Any hints or tips will be most appreciated.