Early Hints for .aspx file extensions

What is the name of the domain?

example.com

What is the issue you’re encountering

I need to setup 103 Early Hints cache for .aspx files

What steps have you taken to resolve the issue?

I’m in the process of setuping Cloudflare to protect and serve an old ASP.Net WebForm website, still using the default .aspx file extension.
I was happy to learn that 103 Early Hints would allow me to boost the perf of the site… until I saw on Early Hints · Cloudflare Cache (CDN) docs that it would work only for URIs with .html, .htm, or .php file extensions, or no file extension.
Is there any workaround to make that feature work with files with .aspx extensions?