Peace everyone,
Finally I found a solution to type Arabic correctly in Fusion,
it works just fine with the text+ node and even the 3dText node.
All you need to do is to use a small free tool called Tadween,
Here is the link to download the tool
[url]https://sourceforge.net/projects/tadween/
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Unfortunately, I don't know how to upload the image of my test, but just give it a try.
Hope this helps you to type Arabic without any problem in Fusion.
CHEERS