APO Caching not working for 301 pages

I’m trying to cache a 301 page on my server. I’d like to have it cached under every condition so I tried adding the following line:
header('Cache-Control: max-age=30000, immutable');

Trying to visit the page https://www.superinformati.com/capelli/ritone.htm
Request sent by Chrome

  1. cache-control: max-age=0
  2. if-modified-since: Wed, 19 Oct 2022 13:58:35 GMT
  3. upgrade-insecure-requests: 1

Response header:

  1. cache-control: max-age=3600, public
  2. cf-apo-via: origin,resnok
  3. cf-cache-status: MISS
  4. cf-edge-cache: cache,platform=wordpress

Why APO is not working as I did expect? Where am I wrong?

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