A substantial part of the US population isn't going to know where the Ivory coast is, even less so if you call it Côte d’Ivoire, or why you're saying it in French.
Would they be better with a different country though? To be fair, a substantial part of the US population couldn’t point Iran or Ukraine[1] on the map.
[1]: https://assets.morningconsult.com/wp-uploads/2022/02/0815180...
No they wouldn't. So why would you make it even harder for them by addressing it in a name/language other then the primary target audience
Côte d’Ivoire is indeed also known as "Ivory Coast"; still, you can write a sentence in English with "Côte d’Ivoire" and it doesn't raise an eyebrow[2]. If that's not enough, there's Curaçao too.
[1]: https://en.wikipedia.org/wiki/Name_of_the_Czech_Republic#Ado...
[2]: https://www.state.gov/countries-areas/cote-divoire