The relevant decrees are published on the President's website.
So, Myroslav Kastran became the ambassador of Ukraine to Slovakia. The appointment decree is dated October 18. By a similar document on the same day, Zelenskiy appointed Serhii Sayenko as ambassador of Ukraine to the Kingdom of Morocco.
Also, Ukraine decided to deprive the ambassador of Iran of accreditation due to the supply of drones to Russia. And on October 18, Minister of Foreign Affairs Dmytro Kuleba initiated the break in diplomatic relations between Ukraine and Iran.