The Biden transactions weren't flagged as "suspicious", they were flagged because of minimum reporting thresholds on overseas transactions. Republicans have been trying to make a big deal over the fact that the banks are "flagging" the Bidens transactions.
"By law, banks report all cash transactions exceeding $10,000 USD — and any transaction of any amount that alerts their suspicions. Money transfer businesses, which often solely send money between countries, sometimes have reporting thresholds as low as $1,000 USD."
This issue was never raised about Trump. Not by Republicans.
Anti-money-laundering specialists proposed filing “suspicious activity reports” about transactions connected to President Trump and Jared Kushner. Bank managers said no.
www.nytimes.com
Explain to me why you would bribe a public official AFTER they left office and could no longer help you. That makes no logical sense at all.