I finally upgraded my secondary laptop to Ventura and can confirm the workaround is possible. After upgrading the OS, just rename Xcode.app to Xcode13.app, install Xcode 14 and then launch Xcode13 using the terminal.
/Applications/Xcode13.app/Contents/MacOS/Xcode
This leads to an “interesting” about dialog, and obviously shouldn’t be used for production builds, but otherwise it appears to work mostly fine (so far).
