Nuclear technology was transferred to Iran from Pakistan in 1980 according to this report from Indian Express which is considered a credible news organization.
The fact that Iran still does not yet possess nuclear weapons may mean that they were not all that keen and now that they have been attacked, their stance may change. In fact I will bet on it as long as they have a market for their oil. If damage to their three nuclear facilities is minimal, all the more reason for them to accelerate the program since they may feel that their facilities are immune to Israel or US bombs.
https://indianexpress.com/article/wo...njani-reveals/