It is not possible to run Xcode on a Windows or Linux operating systems.
It must be inside your /Applications folder.
If the simulators are still not detected even when Xcode is correctly installed in /Applications Open a terminal (using Launchpad), run the command below and restart your Agent:
sudo xcode-select -s $(ls -td /Applications/Xcode* | head -1)/Contents/Developer
There is no need to have an Apple Developer Account in order to do this (on the contrary to iOS physical devices).