The CHERI ISA does not provide temporal safety features but it allows building temporal safety mechanisms in software. CheriBSD 23.11 includes user-space heap temporal memory safety that is enabled by default [0]. The paper "Cornucopia Reloaded: Load Barriers for CHERI Heap Temporal Safety" at ASPLOS 2024 will describe the current implementation [1].
For embedded systems, the CHERIoT [2] platform implements hardware-assisted temporal memory safety without MMU.