https://commonslibrary.parliament.uk/research-briefings/cbp-9870/#:~:text=How close is Iran to,do so” (PDF).
Since May 2019, however, Iran has continued to violate the terms of the JCPOA agreement. It has lifted the cap on its stockpile of uranium, which is now 30 times the level permitted; increased its enrichment activities to 60%, significantly beyond the 3.67% permitted under the JCPOA