cf-polished: degrade=85, origSize=44481, status=vary_header_present

What is the meaning of “status=vary_header_present”? How do I verify that CF is delivering webp for supported browsers?

I am on the Cloudflare Pro plan and Cloudflare Polish is enabled along with the WebP option.

Here is the full HTTP header for an image file(hosted on the same domain) -

accept-ranges: bytes
age: 11
alt-svc: h3=":443"; ma=86400, h3-29=":443"; ma=86400, h3-28=":443"; ma=86400, h3-27=":443"; ma=86400
cache-control: public, max-age=10368000
cf-apo-via: tcache
cf-bgj: imgq:85,h2pri
cf-cache-status: HIT
cf-polished: degrade=85, origSize=44481, status=vary_header_present
cf-ray: 6995cecc39c60ebd-BOM
content-length: 44481
content-type: image/jpeg
date: Tue, 05 Oct 2021 10:01:17 GMT
expect-ct: max-age=604800, report-uri=“
expires: Wed, 02 Feb 2022 10:01:06 GMT
last-modified: Sun, 29 Aug 2021 08:08:48 GMT
nel: {“success_fraction”:0,“report_to”:“cf-nel”,“max_age”:604800}
report-to: {“endpoints”:[{“url”:“"}],“group”:“cf-nel”,"max_age”:604800}
server: cloudflare
strict-transport-security: max-age=31536000; includeSubDomains; preload
vary: User-Agent,User-Agent,Accept-Encoding
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
x-turbo-charged-by: LiteSpeed

:point_up_2: This.

Cache Analytics should show you the type of the content served to the visitors.