A showdown between Presidents Joe Biden and Vladimir Putin isn’t happening, but the fallout from Russia’s invasion of Ukraine and growing tensions between China and the West will be at the fore when leaders of the world’s biggest economies gather in tropical Bali this week. The Group of 20 members begin talks on the Indonesian resort island Tuesday under the hopeful theme of “recover together, recover stronger.” While Putin is staying away, Biden will meet with Chinese President Xi Jinping and get to know new British Prime Minister Rishi Sunak and Italy’s Giorgia Meloni. The summit’s official priorities of health,...