HP lists this spare part number for the HP Chromebook 11 G6 Education Edition in its Maintenance and Service Guide (printed p.10).
Source notes
HP Maintenance and Service Guide for the HP Chromebook 11 G6 Education Edition, spare parts table, printed p.10: "For use in the United Kingdom L14921-031". Read from the cached HP manual (via FDY-MM-016-H6).