Hello @tmora,
Testing your website on my end I can see that x-proxy-cache is returning HIT.
Georgi-Ganchev-new2:~ georgi.ganchev$ curl -IX GET https://www.resu****.com/
HTTP/2 200
date: Mon, 09 May 2022 10:26:45 GMT
content-type: text/html; charset=UTF-8
cache-control: s-maxage=604800, max-age=60
cf-railgun: bb3b47fc98 0.00 0.014866 0030 e6be
host-header: 8441280b0c35cbc1147f8ba998a563a7
link: <https://www.resu****.com/wp-json/>; rel="https://api.w.org/", <https://www.resum****.com/wp-json/wp/v2/pages/2>; rel="alternate"; type="application/json", <https://www.resu****.com/>; rel=shortlink
sg-optimizer-cache-control: s-maxage=604800, max-age=60
vary: Accept-Encoding
x-cache-enabled: True
x-httpd: 1
x-pingback: https://www.resum****.com/xmlrpc.php
x-proxy-cache: HIT
cf-cache-status: DYNAMIC
expect-ct: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=ZHvqlmd83zsykeLCS9nUJ1AIbHWdn5XYGW9SQGYU553Y6O9sLToHi12DIAqqHOb%2BMJ2YXYt0p1VtmVS%2FrkfJJ765Rl%2FC5f%2BBNwVWuI9myyrrzgqXjcddD%2BoRKVVFwSvnFgMhjA%3D%3D"}],"group":"cf-nel","max_age":604800}
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
cf-ray: 7089bd183ef39727-AMS
alt-svc: h3=":443"; ma=86400, h3-29=":443"; ma=86400
cf-cache-status indicates whether or not the page is being served from Cloudflare’s CDN. When it shows up as DYNAMIC it’s possible that APO is being bypassed due to a configuration error or cookie-related incompatibility. You should review your workers and ensure that you have the sg-worker in place since you have the Cloudflare Full Page Caching enabled. Once this is true the cached content is no longer served through the Cloudflare Edge servers directly, but but actually served from the caching under SiteGround which is moved on that Edge.
Best regards,
Georgi Ganchev