If one is going to use the PDF on any mobile device, then one needs to test the PDF not only on different mobile devices but also different apps on those devices. The default viewers for mobile devices do not support many advance features of PDFs, anything beyond display. The do not support form fields.
All PDF display apps for mobile devices have limited processing ability and do not support all the possible features of the computer base Acrobat or Reader.
Have you checked the capabilities of your PDF viewer app on your mobile device?
I see nothing that says the OCG object is supported.