Basically, by answering this question Zelensky is accepting the question's premises, that is Taiwan is a "country". Since you referred the questioner as a troll, you should know that you fall in to the trap if you continue answering the question without first refute the premises.
Either Zelensky is stupid to fall into the trap, or he sincerely regarded Taiwan as a "country".
Remember, whenever someone asks question comparing Taiwan with Ukraine, China's official position always begin with "These two are totally incomparable" before going any further.
Comparing China's position with Zelensky, Zelensky is NOT as "balanced" as China is. China's "balance" is to avoid answering such trapping question, Zelensky does not.
I won't read too much into what Zelensky said in the interview, but he is not as "neutral" as you are trying to interpret.