At least four Southeast Asia firms considering U.S. IPOsU.S. IPOs by Chinese firms slumped - LSEG dataSINGAPORE/SYDNEY, Sept 19 (Reuters) - Several Southeast Asian companies are considering listing in the United States, banking on strong investor appetite for emerging market growth in the absence of Chinese stock offerings.Senior executives in leading SME digital financing platform Funding Societies, Singapore-based entertainment firm Gushcloud International and Thai insurance technology firm Sunday told Reuters they were looking into New York as one of their initial public offering (IPO) venues.This comes on top of recently...