The Word to PDF tool calls soffice with the writer_pdf_Export filter and passes no extra export options such as markup visibility or hyperlink handling, so the conversion follows that filter's own defaults.
Microsoft's support forum states that tracked changes only carry into an exported PDF if the markup was already set to visible in Word before export, not accepted or hidden. PDF with Tracked Changes - Microsoft Q&A
Word To PDFWord To PDF Hyperlinks Tracked Changes
The Word to PDF page offers only upload, edit-file-list, and download steps and has no control for accepting, rejecting, or hiding tracked changes before conversion.
Open the Word document and set the markup display to visible in the Review tab before uploading.
Upload the prepared Word file to the conversion form.
Checking Link and Markup Fidelity
Download the finished PDF from the results screen.
Select a hyperlink in the PDF to verify the destination URL.
Review the document for tracked change annotations to confirm every edit still appears where expected.
Continue with Word to PDF Fonts Formatting Changed or Word to PDF Headers Footers Page Breaks.
Frequently Asked Questions about Word to PDF Hyperlinks Tracked Changes
How do I prepare tracked changes for conversion?
Set the markup display to visible in the Word Review tab before uploading the file.
Where do I find the converted PDF?
Download the finished PDF from the results screen after the process completes.
How do I check if hyperlinks survived the conversion?
Select a link in the downloaded PDF to verify the destination URL.
What should I do if tracked changes are missing?
Open the source Word file again and confirm the markup visibility setting before re-uploading.