You gave no links so we can assume it's just an unsubstantiated claim.
"Obama didn’t give Iran ‘150 Billion in Cash’."
https://sais.jhu.edu/news-press/obama-didn%E2%80%99t-give-iran-%E2%80%98150-billion-cash%E2%80%99
"Obama Didn’t Give Iran ‘150 Billion in Cash’"
https://www.factcheck.org/2019/03/obama-didnt-give-iran-150-billion-in-cash/
