Adobe InDesign supports import of many formats to be placed to a new document (File ► Place formats), including file types from Microsoft Word (.doc, docx). This is probably the only reliable way how to produce an InDesign document from a Word document source. No other 3rd party software capable of such DOCX to INDB conversion is known to us at this time.
Convert Microsoft Word Open XML document to Adobe InDesign publication.
We found 2 software records in the database related to .docx to .indb file format conversion.
Microsoft Windows software - convert docx to indb on Windows
Professional desktop document publishing software from Adobe
Convert from docx file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned docx to indb. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert docx to indb on OS X
Mac version od Adobe's popular document designing and publishing software