I've installed ColdFusion 2021 developer edition on a Windows machine. I accepted the defaults when installing. Did this install Apache for the web host or IIS or something else?
CF2021 would have installed tomcat as a web server connector. If port 8500 was available it would use that for tomcat HTTP web server to run CFadmin on. Suggest use Windows tools to install IIS then use CF WSCONFIG to connect CF to IIS.
This might help https://helpx.adobe.com/coldfusion/user-guide.html/coldfusion/installing/configuring-your-system.ug.... see chapter “Configuring IIS in Windows”
Hope that helps, Carl.