As the text does not appear correctly on pasting in Photoshop file, could you please confirm the exact steps you do to copy and paste the text? Could you please confirm if the issue occurs only when copying text from PDF?
Try copying Arabic text from some other format file and check if you experience a similar behavior.
Share the Acrobat and Photoshop version details with us.
So, my steps for coping the text from comments is easy - open pdf, open comments and copy (ctrl+c) the text in teh comment which costumer wants me to change. Open Photoshop and paste (ctrl+v) to its place.
Issue is really only with Acrobat - from any other source the text is okay and correct.
Photoshop version 22.3.0 / Acrobat version Adobe Acrobat X Pro version 10.1.16