"Under supervision".[1] Rumors that he planned to escape to Dubai. But Dubai signed an extradition treaty with the US a few months back.
Extradition to the US may be pending.[2]
This is the sort of situation where, if there is an arrest, the perp gets held as a flight risk.
[1] https://cointelegraph.com/news/sam-bankman-fried-is-under-su...
[2] https://www.dailymail.co.uk/news/article-11433541/FBI-planni...