What chipset does Mi TV run?

Check Kodi under system.settings it will say.

What, it's rotated?

Can someone extract the Prime Video Apk ?

Edit: Fix typo

Is that 55" one or smaller one?

Just for information. Not many TVs are supported by Netflix including MiTV. They can play Netflix because most are using modded version.

https://skyjuiceiswater.blogspot.com/2019/04/playing-netflix-movies-in-xiaomi-tv4.html