Is There a Corrupt Business Dealing With 50 Different Nations?

Donald Trump said all this stuff about corrupt business dealings with 50 separate nations with between Joe Biden and Hunter Biden. Two years later, CBS News finally confirms what we've all known all along that it was verified. And don't tell me that Hunter Biden didn't have conversations with his father about dealings with Russia and China. Well, that's what's going to come out. It's absolutely. Why is there an investigation? I know it's impossible, near impossible, to subpoena a sitting president but why wasn't he subpoenaed before the election about his involvement with Hunter?