Moving such plants which were consistently under watch of various actors, especially US satellites isn't possible without detection. They were keeping such close eyes that they even eliminated top scientists. They knew who comes and goes from these facilities. Remember Israel did a suprise attack, and it was checking movements for a long long time. They were gathering intelligence for over a decade. Moving after Israeli attack isn't possible as IDF was constantly flying and hitting targets in and around. I believe (although I didn't wanted this to happen) that Iran's nuclear capability is largely gone. That was decades of work. We all want to believe that perhaps Iran still have nuclear capabilities but reality looks really different.
Trying to recover this will invite another strikes. Iran better should focus on Hypersonic missiles, air defense first also build an airforce. Once these conventional capabilities are strong enough to safeguard its nuclear projects, then only Iran should restart work on nuclear program. For next 10 years focus should on only getting cutting edge conventional capabilities.