On XWiki 14.10.18 with LibreOffice 7.5.8.2, Chrome 119, Windows 11 using a page named "Word doc7" the exports are:

• ODT - xwiki_Word+docs_Word+doc7_WebHome.odt
• PDF - Word doc7.pdf
• RTF - xwiki_Word+docs_Word+doc7_WebHome.rtf
• HTML - Word+docs.Word+doc7.WebHome.zip
• XAR - Word+docs.Word+doc7.WebHome.xar

Currently only the PDF export matches with the page name without the "+" sign.