Almost everyone wishes it were otherwise but Iran seems to be far from being unified.
This nuclear agreement was apparently not honoured by Iran.
"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%".
https://commonslibrary.parliament.uk/research-briefings/cbp-9870/