Jetson’s have some Cortex-R series, but they are not for functional safety. They’re used within engines which need realtime behavior, e.g., the Audio Processing Engine (APE) or Sensor Processing Engine (SPE). I don’t know what its use is, but I think there is also an undocumented Cortex-R52. Of all of these, the only one I’ve heard of anyone being able to “hijack” and use for their own purposes is the APE’s Cortex-R5.
The “Drive” series (automotive) are the ones with functional safety, but I couldn’t tell you what they have in particular.