Thanks for the quick response.
the issue is not for one language it is all Indian languages and Arabic, Pashto, Dari, etc.
I found out that this issue with all texts paid assets including Unity's built-in text. it does not support Gpos and Gsub(glyphs) in any font.
You can test this article.
https://www.amarujala.com/dehradun/uttarakhand-foundation-day-2023-article-bjp-d...