Hi! On my side I've tested on XWiki 17.4.5 (Edge 140/ Oracle 19c) and on 16.10.11 (PostgreSQL 17) using LibreOffice 25.2.5 with the original .docx file (52 pages) by importing it with "Create > Page from Office" and by importing the file using "Import Office File" from CKEditor and it seems I couldn't reproduce the issue, the file was imported successfully and the emojis are displayed on the imported page.
Maybe the issue reproduces on certain conditions only or there is a change between the LibreOffice versions.
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