Toggling the switcher button to enable or to disable event registration does not trigger the webhook which states "Any change to event settings except: Changes to registration form, Changes to registration types, Changes to event email settings or templates". The event registration webhook only covers "Any change to event registration details for any registrant, including: New registration, Canceled registration, RSVP response".

I have tested it and every other edit to my events triggers the corresponding webhook, but not when it's enabling or disabling the event registration.