The fact that Ukrainian President Zelensky is not a trusted person of the United States is evidenced by the current extreme aggravation of relations between him and Trump due to the fact that Zelensky does not want to sign the predatory draft agreement on rare earth minerals of Ukraine proposed by Trump and consistently defends the interests of Ukraine.
The US regime doesn't need to trust their puppet, they just need him to obey their commands. If he doesn't, they know how to put pressure on him to make him obey and if he continues to refuse they'll simply eliminate him and then install another puppet.
FYI the Zionist Zelensky has already signed a lot of Ukraine's lands and resources to the US over the past years. They're just making a big deal out of this last one as a show to increase his popularity inside Ukraine, something he has lost due to Ukraine's loss in the war and how they still arrest Ukrainians on the street to force them to go to the frontlines.
And why, in your opinion, did Zelensky become a Zionist? Zionism is a Jewish national movement
Zionism has nothing to do with Judaism, ask any Jew and they'll tell you that.
Zionists are like the radical Wahhabis and just like Wahabis who created ISIS and al-Qaeda have nothing to do with Islam, the Zionist radicals who created Israel have nothing to do with Judaism.

As for Zelensky he has said it himself that he is a Zionist and he is an open supporter of the Zionist terrorist organization named Israel.