Hello,
I have installed visual studio for mac 2019 today in order to start learning Xamarin. My dev machine:
Mac Book Pro with Big Sur version 11.2.3
XCode version Version 12.5.1 (12E507)
After I created the first sample project, I noticed the message says it does not detect the installed XCode. Checked the vs configuration of the SDK location:
/Library/Developer/CommandLineTools
I use the command below to check my SDK installation. It shows the SDK location is the same as vs configuration.
% xcode-select -p
/Library/Developer/CommandLineTools
Attached is the content of "/Library/Developer/CommandLineTools".

I don't know what else is needed to make it work.
Thanks,
Frank