Help with error code 2004f

Mac error -2004F usually indicates a network-related problem connecting with the Apple servers used for macOS Recovery.

Here is: How to start up from macOS Recovery - Apple Support

Which model Mac are you attempting to recover? (A Mac with an Intel processor and a Mac with an Apple silicon processor will work somewhat differently here.)

What happened with the Mac that led you to try Recovery?

I’m going to assume you are not using macOS Server here (the forum where this was posted), as the classic macOS Server (not as an MDM server) was last available with macOS 10.13; a while ago.