U.S Citizen Investing from a Taiwanese Bank

I’m married here in Taiwan and having the cultural propensity to save and invest for the future I thought I would start off with some Mutual Funds. I was just told by Cathay Bank (Xinyi) that they wont/can’t sell any investing instruments in to Americans because they don’t want to upset the US government. (They are worried that the investor wont report their profits and might have the US government inching in)
So, as an American here in Taiwan what are my options to invest? Where can I comfortably purchase stocks, bonds and mutual funds?

…Thanks