My Arabic text is all smooshed together in reverse order - Adobe 2021 (16.1) Mac OS Big Sur (11.2.3)
I was having the exact same problem on InDesign (English: USA), I spent an hour researching online and finally did every single thing that was suggested on all the various forums:
- Uninstalled InDesign
- Changed my preferences in Creative Cloud to all apps in (English: arabicscript)
- Re-installed InDesign
- Opened a document
- Created a NEW text box
- Changed the language to Arabic
- Changed the script to an Arabic script XB Zar
- Changed the Paragraph alignment to RTL
- Changed the Paragraph to right-aligned
- Changed the Character style itself in the Character hamburger to Right-to-left

And the result is this absolutely atrocious ugly mess of all my beautiful Arabic letters smooshed together, upside down, inside out, last character first:


See below for how it is SUPPOSED to look, elegant and beautiful and harmonious, and right to left, all the characters in the right order:


