The community member is trying to have dynamic pages like "example.com/planes/PLANE_NAME" load "example.com/planes/PLANE_NAME.html" instead, without using a bunch of 301 redirects. Another community member suggests that this is an older pattern, and that the 301 redirect is the best option, which can be set up using Cloudflare page rules or Workers. The community member's attempt to achieve this did not work.
I'm trying to have a dynamic page like "example.com/planes/PLANE_NAME" load "example.com/planes/PLANE_NAME.html" instead. In other words I always want ".html" appended to each dynamic page and load that instead. I would prefer not us use a bunch of 301 redirects. Please see image for my attempt which did not work.