This doesn’t make any sense to me since I believe level 11 is strictly superior to lower levels for static content. It is slightly slower to compress but this doesn’t matter when serving static content which does not need to be compressed at runtime.
Since cloudflare messes with the Accept-encoding header we’re also prevented from sniffing browser support for brotli on the server (?). This effectively prevents any use of brotli level 11 on a site using cloudflare.
Could you fix this by compressing brotli files with level 11 for static content? If that’s not possible maybe there is some other solution like letting your users serve their own brotli compressed files?
PS. If someone knows of a good workaround I would love to hear it!