I've already had this issue before... InDesign export PDF refuses to export any images. Some are PNG embedded and some are linked PDFs both don't show up. Why does this keep happening?
Thanks so much for sharing these updates and the screenshot. I completely understand how frustrating this must be.
I recommend moving your InDesign file along with all linked assets to a fully local drive and making sure the files are completely synced and available offline (not stored as 'online-only' or on-demand). Once everything is local, try exporting the PDF again to see if the images export correctly on the first attempt.
Could you also confirm your exact InDesign version and OS details? Please let me know if this happens with brand-new files as well, or only with specific existing ones. If possible, it would be really helpful if you could share a sample file for us to test. If the file is confidential, you can send it via DM on the community. Before sharing, please package the file using this guide: https://adobe.ly/4eTyuPN
No issues like that. I just keep exporting it over and over and eventually it will include the images. No idea why. Another one of the many joys of CC... /s
Have you tried replacing the embedded images by opening & resaving in new location & placing? Is this all docs, or one particular doc? If one particular, try saving out to and .idml and seeing if the issue persists with the new file.