Not seeing "Sentry-Hook-*" headers for WebHook

I just created a WebHook integration (version 9.1.2).

I’ve been testing it and I don’t see any of the Sentry-Hook-* headers I would expect as documented: https://docs.sentry.io/workflow/integrations/integration-platform/webhooks/#headers

The headers I see look like this:

{
   "host":"omitted.ngrok.io",
   "sentry-trace":"00-omittedomittedomitted-omittedomittedomitted-00",
   "accept-encoding":"gzip, deflate",
   "accept":"*/*",
   "user-agent":"sentry/9.1.2 (https://sentry.io)",
   "content-type":"application/json",
   "content-length":"5989",
   "x-forwarded-proto":"https",
   "x-forwarded-for":"omitted"
}

Any idea why I’m not seeing said headers and how I can proceed to validate the requests I receieve?

Thanks so much,

-Bradley