Is it possible that the author of the PDF form did not add a Submit button to the PDF form?
Would you please open the same PDF form in the desktop version of Acrobat Reader on a Windows and Mac computer to check if a Submit button is visible? (So you can determine if it is a defect only in the mobile version of Acrobat Reader.)
Even if the PDF form has no Submit button, you can still send your completed PDF form (or any other PDF documents) via email from the mobile version of Acrobat Reader.
Please take a look at the "Share a File" section (the first section) of the online Help documentation for Acrobat Reader for Android.
Hope this helps.
The file has a submit button on Windows and Mac computers. Just not on
mobile device. Also, file was saved with Reader Extender (I think that is
supposed to help).
Would it be possible to share your PDF form with us (Adobe) so that we can investigate the cause of the problem?
I have sent you a forum private message with the instructions on how to share your file with us.
Thank you for your help.