ROME—Ukrainian President Volodymyr Zelensky called on Pope Francis to support Kyiv’s formula for peace—based on returning Ukraine’s territory—in a pointed message to the pontiff, who has refused to explicitly condemn Russia’s invasion. The pope, who met with Mr. Zelensky at the Vatican on Saturday, has offered to serve as an intermediary in negotiations between Kyiv and Moscow but his neutral stance, and his suggestions that the West provoked the war, have raised skepticism in Ukraine. ...