The outflows reached $2B because many people were victims of FTX saga...
No, this outflow is not a consequence of the FTX collapse, it is related to the Reuters message, which states that the US Department of Justice may charge the Binance crypto exchange and its executives with money laundering and sanctions violations. I think this Fud will dissipate soon.
I also think that it will just die out unless the prosecutor had found traces of evidence that can pinpoint Binance of money laundering. I think this is the way FTX going back at Binance of abandoning the deal that was supposed to save FTX from collapse. But then, the decision of Binance is just because of the misappropriation of funds by FTX CEO and Binance doesn't want to be a part of it or catch a falling knife.