You have to remember that the Pope is South American and to the political leaders of South America, especially those on the left, the US is evil and therefore Ukraine has the wrong friends.
In this regard, the bias of Pope Francis against the United States has put him on the wrong side of history.
He could have unified the Orthodox (minus Russia) with the Catholic Church but he has failed a huge failure. He could have increased support for Ukraine and end the war faster. He could have condemned the Russian Orthodox clergy that promote this evil was against the people of Ukraine. He has failed.