Hi,
I installed Cloudflare Plugin for my Wordpress site https://www.datanumen.com/ and Data Recovery Blog, then enable the APO for both sites. Then I follow the instructions in Verify APO works · Cloudflare Automatic Platform Optimization docs to verify whether APO works or not.
The CF-Cache-Status and cf-apo-via does appear in the header, but cf-edge-cache does not, see attached image for the description of cf-edge-cache and the actual response header.
I try many times, and find sometimes cf-edge-cache will appear, but not always.