Bengali typesetting issues (World Paragraph thinks it's Arabic?!)

Comparisons between Original, Illustrator and the weird InDesign Bengali typesetting
Am trying to typeset a document in Bengali. This is using a Bangla font from Adobe Fonts. I could get it to match the correct wordings using Illustrator (with “Show Indic Options” selected under Preferences, but I cannot get it to work in InDesign even with the Language set to “Bengali (India)”. I tried selecting “World-Ready Paragraph Composer” but it looks even more “off/wrong”.
What am I doing wrong? I tried installing the middle east InDesign but it’s still the same.
I have tried troubleshooting with the Adobe live support and had a 40 min call / remote desktop sessions with them but they don’t understand what’s the problem either.
Please help as I don’t want to rely on Illustrator for this book I am working on!
