Safari: Cannot debug iOS simulator after installing Xcode 12 beta (no web view shown in the "Develop" menu)

After installing Xcode 12 beta, all my Simulators won't be displayed in the "Develop" menu.

macOS 10.15.5 (19F101)
Safari Version 13.1.1 (15609.2.9.1.2)

I am using Xcode 11 to run and debug instead of Xcode 12
I happened similar case, and fixed with this way:
https://developer.apple.com/forums/thread/132890?answerId=616133022#616133022

It buggy about Web Inspector in Mac-Safari 13.
I suggest try to use Mac-Safari 14 by Technology preview if you want.

Safari: Cannot debug iOS simulator after installing Xcode 12 beta (no web view shown in the "Develop" menu)
 
 
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