I had to escalate an issue with Hikvision tech support to learn this, but...
The "Rotate" feature (corridor mode) isn't displayed when "Smart Event" is enabled (which is how it comes from the factory).
Go to Configuration > System > System Settings > VCA Resource and change it to "Monitoring"...
I encountered a similar issue where the "Rotate" option wasn't visible in the expected location (Configuration > Image > Video Adjustment) with my Hikvision DS-2CD2087G2-L bullet camera, and came across this thread. I was replacing my old DS-2CD2032-I cameras which had this feature and the...