Hello Anca Luca! I don't see any other open tickets on this topic. I was under the impression (maybe mistaken) that this ticket remained for the ODT / RTF / HTML / XAR exports and XWIKI-20731 only for the PDF export (which is correctly exporting as Word doc7.pdf).
Do you want me to create separate tickets for Office formats (ODT and RTF) and Other formats (HTML and XAR)?
Currently, from my tests on XWiki 15.10.8 (Cloud) with LibreOffice 7.6, Chrome 126, Windows 11 using a page named "Word doc7" the exports are:
ODT - xwiki_Word-doc7_WebHome.odt
RTF - xwiki_Word-doc7_WebHome.rtf
HTML - Word-doc7.WebHome.zip
XAR - Word-doc7.WebHome.xar
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