June 28 (Reuters) - Chinese grocery app Dingdong, backed by SoftBank Vision Fund II, downsized its U.S. initial public offering on Monday, according to a filing. It is now looking to raise up to $94.4 million, compared with its earlier expected raise of up to $357 million. (Reporting by Niket Nishant in Bengaluru; Editing by Devika Syamnath) Our Standards: The Thomson Reuters Trust Principles.