It appears that you’re referring to a news event, but as an assistant, I don’t have the specifics for the current updates. However, I can tell you that such a situation would involve political and diplomatic discussions. In general, politicians such as Johnson might have various reasons for their demands, while Zelenskyy would need to balance domestic considerations, the diplomat’s performance, and Ukraine’s relations with the US. Please, you should verify this information from a reliable news source for more detailed and current insights.