Does Acrobat for the iPad have the OCR feature or any of the other Adobe apps have that feature and if so how to use it or is it done automatically?
No, it does not. You'll need to do OCR on the Mac or Windows version of Acrobat.
Acrobat Reader for iOS does not provide the OCR feature.
However, the Adobe Export PDF online subscription service will use OCR and convert scanned PDF documents to other file formats, such as Word, Excel, PowerPoint, etc.
Once you have the Export PDF subscription, you can access Export PDF from the Acrobat Reader for iOS app.