Not sure what you mean by “support” there. The linked release note shows that Xcode 13.2.1 comes with iOS 15.2 SDK, but there’s no separate 15.3 SDK anyway. (The next Xcode beta has a 15.4 SDK.) And aside from the troubleshooting needed on some setups for whatever reason, using this Xcode with a 15.3 device does work.

Also, in the future please use the “Code Block” formatting style for error messages and source code.