https://stackoverflow.com/questions/63103559/swiftui-preview-stopped-working-on-one-specific-device
I finally came across the solution, thanks to @Monica Granbois.
First delete:
~/Library/Developer/Xcode/UserData/Previews/Simulator Devices/
Then run this line at the terminal:
killall -9 com.apple.CoreSimulator.CoreSimulatorService
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