Spurious HTTP 2.0 requests to origin server

According to Understanding Cloudflare HTTP/2 and HTTP/3 Support – Cloudflare Help Center the edge server only supports HTTP/1.1 requests to the origin server.

So I do not understand why some request from cloudflare are logged as HTTP/2.0?

(Support Ticket reference #2201539)

Official response from CF support:

Cloudflare are currently working on allowing connections to the Origin via HTTP 2. This is currently getting rolled out to a small percent of customers on our free plan …

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