Thanks for the quick turnaround. I can confirm that worked, so you're definitely on the right track. For others who need this in the interim, the command above only works once - mv fails if the target folder already exists, which happens if you run this command more than once. Here's a version of it that does some cleanup at the beginning, so you can just run the command whenever there's an issue: rm -r ~/Library/Developer/CoreSimulator/Caches/dyld_old ; mv ~/Library/Developer/CoreSimulator/Caches/dyld{,_old} ; sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService

This happens for me, too, though I can't preview any widgets at all regardless of platform. I think this might be an internal problem with Xcode 14 Beta 1.