Xcode uses the device version to disambiguate devices with the same name. If two devices have the same name and version number, it will show the devices' UDIDs.
You have 4 of each of all your device types, so I suspect that some of them are for the same iOS version. You should delete some of the duplicates. Check out
xcrun simctl list
and
xcrun simctl delete
or go to Windows>Devices in Xcode to delete or rename your devices.
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