Simulators not getting listed in Xcode 12

I'm trying to run a test app made in Unity with Xcode 12's simulator. I'm unable to find the list of Simulators available with Xcode, though I have a default set of Simulators in the "Device & Simulator" tab with the option "Show as run destination" checked.

But I do not have a provisioning profile for time being as I'm unable to sign-in into my developer account.

is the reason that I don't have the provisioning profile, I'm unable to find the list of simulators to test? or is there a way to test the app with the simulators without having the provisioning profile?
Simulators not getting listed in Xcode 12
 
 
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