3rd party epbu 3 reader

If you were prepared to do without the animations you could create a PDF from your InDesign document (with hyperlinks). It would be able to be read on any device that downloaded it and it would be offline.

To amend my previous answer: the document you linked to is pretty much a powerpoint presentation. Consider rebuilding it in either Powerpoint or LibreOffice Impress. Everyone can display those. (LibreOffice is free and open source, so no barriers there)

You are out of luck, I am afraid: the only reader that works without any issues when viewing these more interactive fixed layout epub3 documents at the moment is Apple's iBook reader.

No such reader exists on either Windows/Linux or Android.

It is an unfortunate and almost unbelievable situation, but it is what it is. Hopefully the stituation will improve in the near future. But for now there is no real solution, other than converting your interactive FXL epub3 projects to web pages with the free html export plugin or converting it to an actual working app/executable.

As long as no reliable FXL epub3 reader exists for Windows and Android, these type of interactive animated FXL epub3 files are unreliable outside the Apple ecosystem.