While writing Arabic text not appear correctly most of the words are hidden except the first letter.
I hope adobe fix this issue soon
The fact is Adobe XD doesn't have a proper Arabic support yet. Having said that, there are some tricks to reveal Arabic text on your Design page, but you need to test it on your prototype later.
Type your Arabic text, highlight what you just typed, switch between Area Type, and Point type options as shown below…
Thank you for reaching out and sharing your feedback. In addition to what Zaid has suggested, we would request you to please submit your feeback for RTL language text support in Adobe XD here: https://adobexd.uservoice.com/forums/353007-adobe-xd-feature-requests/suggestions/12962217-hebrew-ar... and upvote the request to add your voice.
Use Adobe arabic font