Bookmarks of table of contents not appearing in Acrobat Pro 2024

Make sure you're exporting your PDF with compatibility set to Acrobat 6 (PDF 1.5) or higher. Some features, like bookmarks, may not be supported in older PDF versions.

Double-check that you've selected the "Bookmarks" option in the "Include" section of the "Export Adobe PDF" dialog box in InDesign. Sometimes, if this option is not selected, bookmarks won't be included in the exported PDF

When generating the table of contents in InDesign, verify that you've selected the correct options, including "Create PDF Bookmarks." Sometimes, overlooking this step can lead to issues with bookmark generation.

Even if bookmarks are included in the PDF, they might not be immediately visible in the bookmarks panel in Acrobat Pro. Try expanding the bookmarks panel or searching for specific terms that should match your bookmarks.

Ensure that your version of Acrobat Pro is up to date. Sometimes, compatibility issues arise with older versions of Acrobat Pro that may prevent bookmarks from displaying correctly.

Open the exported PDF in different PDF viewers to see if the bookmarks appear. This can help determine if the issue is specific to Acrobat Pro or if it's a problem with the PDF itself.

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In rare cases, issues with PDF export settings might be related to InDesign preferences. Resetting preferences or troubleshooting them might resolve the problem.

Windows: Start InDesign, and then press Shift+Ctrl+Alt. Click Yes when asked if you want to delete preference files.
macOS: While pressing Shift+Option+Command+Control, start InDesign. Click Yes when asked if you want to delete preference files.
A dialog will appear asking to delete the InDesign Preferences, select 'Yes' on this dialog.
Further info and instructions here if needed:
https://helpx.adobe.com/in/indesign/kb/indesign-preferences-support-file-locations.html

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If a document is not behaving well then try 

File>Export 

Choose IDML

Open the IDML in InDesign
Save the file as a new InDesign file with a new name
See if the issue persists.

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Reinstalling rarely fixes everything - you can do a complete reinstall using the
Creative Cloud Cleaner Tool https://helpx.adobe.com/creative-cloud/kb/cc-cleaner-tool-installation-problems.html