Visual Studio for Mac is a completely different product, that doesn't even support extensions. It is actually originally based on Xamarin Studio which has been rebranded.

See https://stackoverflow.com/questions/44825177/installing-extensions-on-visual-studio-2017-mac and https://developercommunity.visualstudio.com/t/extension-support-for-visual-studio-2022-for-mac/1554393.