I don’t think there is an exact science to how Oscars presenters are chosen. But when it comes to international categories they may prefer to choose someone who is at the top of their game ( in their country), is popular atleast with their target audiences in the US, and preferably has some international recognition.
Deepu just had an amazing run with Pathaan, she is one of the LV global ambassadors AND I know her fans want to forget this, but she has actually starred in a Hollywood production. 
Choosing her isn’t that far off the mark, but if they went with AR Rahman who won for slumdog, that would have been acceptable but cmon deepu in that dress, looking like a million bucks >>>>> 😂
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
  
  
  
 
  
  
 
  
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
         
          
11