Can a country “choose” the ambassador of another country? That’s counterintuitive to me

Countries choose their own ambassador to another country. The nominee this article is about is from the US.

Separately however, countries can choose to accept or reject the ambassadors other countries send to them. It's very uncommon to reject them, but actually South Africa’s ambassador to the US was expelled earlier this month. I wouldn't be surprised if South Africa doesn't accept Bozell.