I'm using following API to detach shared flow from a flow hook:
Detach a shared flow from a flow hook
One of the parameters is {flow_hook} name, but it's not possible to find actual {flow_hook} names in documentation. Also, it is not possible to get this names via management API.
I've made some research with Edge UI and I was able to guess those names correctly:
[ 'PreProxyFlowHook', 'PreTargetFlowHook', 'PostTargetFlowHook', 'PostProxyFlowHook' ];
I think it would be great if current documentation will have this information in place.