When will Volodymyr Zelensky cease to hold the office of President of Ukraine?

Volodymyr Oleksandrovych Zelensky is a Ukrainian politician who has been serving as the sixth president of Ukraine since 2019. He was formerly a comedian and actor. Since the start of the Russo-Ukraine conflict, numerous Ukrainian political parties have been banned for allegedly holding pro-Russian views, in addition to journalism reforms which largely prohibit criticism of the Ukrainian government. Ukraine has also indefinitely postponed its elections, which cannot be held under martial law according to the country's constitution. As such, questions have been raised regarding when/if Zelensky will leave office as president of Ukraine.