Acrobat Pro and Acrobat Standard do support Arabic in many ways such as filling up forms, adding comments, and the like. Acrobat however will fail mostly in editing a PDF with Arabic content, for instance if you want to add or edit text to non-form text frames.
I’m a frequent user of the Adobe DC and I use it on all of my PDF, my problem that it’s not showing the Arabic fonts on editing to a PDF file or Singing it, like if I want to add the word “سلام” it will show it like “س ل ا م” separating each character. I tried the support for couple of years and was updating my versions as available, but still not working.
Waiting for your support & feedback.