In 2026, the restrictions on using centrifuges, including advanced ones, begin to expire, gradually until 2028.
In 2030, the Iran deal expires entirely, without limits on uranium enrichment, on stockpiling, heavy water reactors, or plutonium.
And we know that we can trust them because; "Since the conclusion of the JCPOA, Iranian political and military leaders have stated that they will never allow IAEA inspectors to access military sites, a position completely at odds with the provisions of both the JCPOA and Iran’s Comprehensive Safeguards Agreement."
Link: https://www.fdd.org/analysis/2018/04/04/the-iaeas-right-and-obligation-to-inspect-military-facilities-in-iran/#:~:text=Since%20the%20conclusion%20of%20the%20JCPOA%2C%20Iranian%20political,both%20the%20JCPOA%20and%20Iran%E2%80%99s%20Comprehensive%20Safegua