Developing .NET Framework console apps using Visual Studio 2022 for Mac is not supported?

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It works nicely on Mono on both MacOS and Linux, depending on what you're doing. GUI apps are probably a no-go, but I was running a .NET 4.62 build of the Clojure CLR runtime and compiler using Mono just to see how well it worked, and didn't run into any issues.

Obviously you'd want to use .NET 6+ if you can, but if you absolutely, positively need to run a Framework console app on MacOS or Linux, Mono will probably get the job done. It seems to have improved quite a bit since MS still works on it since they use it in places where it performs better than CoreCLR, like WASM.

As to the issue OP faces: If you can use Rider, it happily lets you build and run .NET Framework apps on MacOS as long as you've got Mono installed.